Camps, J. (2003). Concurrent and retrospective verbal reports as tools to better understand the role of attention in second language tasks. International Journal of Applied Linguistics, 13, 201-221.
 Doughty, C., & Varela, E. (1998). Communicative focus on form. In C. Doughty, & J. Williams (Eds.), Focus on form in classroom second language acquisition (pp. 114-138). Cambridge: Cambridge University Press.
 Doughty, C., & Williams, J. (1998). Pedagogical choices in focus on form. In C. Doughty, & J. Williams (Eds.), Focus on form in classroom second language acquisition (pp. 197-261). Cambridge: Cambridge University Press.
 Ellis, R., Basturkmen, H., & Loewen, S. (2001). Preemptive focus on form in the ESL classroom. TESOL Quarterly, 35, 407-432.
 Grim, F. (2008). Integrating focus on form in L2 content-enriched instruction lessons. Foreign Language Annals, 41, 321-346.
 Han, Z. (2002) A study of the impact of recasts on tense consistency in L2 output. TESOL Quarterly, 36, 543-572.
 Harley, B., & Swain, M. (1984). The interlanguage of immersion and its implications for second language teaching. In A. Davies, C. Criper, & A. P. R. Howatt (Eds.), Interlanguage (pp. 291-311). Edinburgh: Edinburgh University Press.
 Houston, T. (1997). Sentence processing in Spanish as a second language: A study of word order and background knowledge. In W. R. Glass, & A. T. Pérez-Leroux (Eds.), Contemporary perspectives on the acquisition of Spanish, vol. 2: Production, processing and comprehension (pp. 123-134). Somerville, MA: Cascadilla Press.
 Howatt, A. P. R. (1987). From structural to communicative. Annual Review of Applied Linguistics, 8, 14-29.
 Lee, J. (2003). Cognitive and linguistic perspectives on the acquisition of object pronouns in Spanish as a second language. In B. Lafford, & R. Salaberry (Eds.), Spanish second language acquisition state of the science (pp. 98-129). Washington, DC: Georgetown University Press.
 Lightbown, P. (1998). The importance of timing in focus on form. In C. Doughty, & J. Williams (Eds.), Focus on form in classroom second language acquisition (pp. 177-196). Cambridge: Cambridge University Press.
 Lightbown, P., & Spada, N. (1990). Focus on form and corrective feedback in communicative language teaching: Effects on second language learning. Studies in Second Language Acquisition, l2, 429448. http://dx.doi.org/10.1017/S0272263100009517
 Long, M. H. (1991). Focus on form: A design feature in language teaching methodology. In K. De Bot, R. Ginsberg, & C. Kramsch (Eds.), Foreign language research in cross-cultural perspective (pp. 39-52). Amsterdam/Philadelphia: John Benjamins.
 Long, M. H., & Robinson, P. (1998). Focus on form: Theory, research, and practice. In C. Doughty, & J. Williams (Eds.), Focus on form in classroom second language acquisition (pp. 15-41). Cambridge: Cambridge University Press.
 Lyster, R. (2004). Differential effects of prompts and recasts in formfocused instruction. Studies in Second Language Acquisition, 26, 399-432. http://dx.doi.org/10.1017/S0272263104263021
 Pishghadam, R., Khodadady, E., & Rad, N. D. (2011). The effect of form versus meaning-focused tasks on the development of collocations among Iranian intermediate EFL learners. English Language Teaching, 4, 180-189. http://dx.doi.org/10.5539/elt.v4n2p180
 Qin, J. (2008). The effect of processing instruction and dictogloss tasks on acquisition of the English passive voice. Language Teaching Research, 12, 61-82.
 Rahimpour, M., Salimi, A., & Farrokhi, F. (2012). The effect of intensive and extensive focus on form on EFL learners’ written accuracy. Theory and Practice in Language Studies, 2, 2277-2283.
 Saeidi, M., Zaferanieh, E., & Shatery, H. (2012). On the effects of focus on form, focus on meaning, and focus on forms on learners’ vocabulary learning in ESP context. English Language Teaching, 5, 72-79.
 Schmidt, R. (1990). The role of consciousness in second language learning. Applied Linguistics, 11, 17-46.
 Sheen, R. (2005). Focus on forms as a means of improving accurate oral production. In A. Housen, & M. Pierrard (Eds.), Investigations in instructed second language acquisition (pp. 271-310). Berlin: Mouton de Gruyter. http://dx.doi.org/10.1515/9783110197372.2.271
 Spada, N., Lightbown, P., & White, J. (2005). The importance of form/meaning mappings in explicit form-focused instruction. In A. Housen, & M. Pierrard (Eds.), Investigations in instructed second language acquisition (pp. 199-234). Berlin: Mouton de Gruyter.
 Swain, M. (1985). Communicative competence: Some rules of comprehensible input and comprehensible output in its development. In S. Gass, & C. Madden (Eds.), Input in second language acquisition (pp. 235-253). Rowley, MA: Newbury House.
 Toth, P. (2000). The interaction of instruction and learner-internal factors in the acquisition of L2 morphosyntax. Studies in Second Language Acquisition, 22, 169-208.
 VanPatten, B. (1993). Grammar teaching for the acquisition-rich classroom. Foreign Language Annals, 26, 435-450.
 VanPatten, B., & Cadierno, T. (1993). Explicit instruction and input processing. Studies in Second Language Acquisition, 15, 225-241.
 VanPatten, B., & Fernández, C. (2004) The long-term effects of processing instruction. In B. VanPatten (Ed.), Processing instruction theory, research, and commentary. (pp. 273-289). Mahwah, NJ: L. Erlbaum Associates.
 VanPatten, B., & Oikkenon, S. (1996). Explanation versus structured input in processing instruction. Studies in Second Language Acquisition, 18, 495-510.
 VanPatten, B., & Sanz, C. (1995). From input to output: processing instruction and communicative tasks. In F. R. Eckman, D. Highland, P. W. Lee, J. Milcham, & R. Rutkowski Weber (Eds.), Second language acquisition theory and pedagogy (pp. 169-185). Hillsdale, NJ: Erlbaum.