[1] Olaitan, S.O. and Lombin G. (1985) Introduction to Tropical Soil Science. Macmillan Publishers, Lagos.
[2] Osinem, E.C. (2005) Environmental Education in Agriculture. Cheston Agency Ltd., Enugu.
[3] Anyanwu, A.C., Anyanwu, B.O. and Anyanwu, V.O. (2003) A Text Book for Agricultural Science for Schools and Colleges. Afp Africana Feb Publishers Ltd., Onitsha.
[4] Olaitan, S.O. (2005) Soil Erosion Management Education. University of Nigeria Nsukka. (Unpublished)
[5] Morgan, R.P. (1996) Soil Erosion and Conservation. Longman Group Ltd., London.
[6] Sullivan, R.C. (1995) The Competency Based Approach to Training. JHP’EGO Corporation, Scotland.
[7] Olaitan, S.O. (2003) Understanding Curriculum. Ndudim Printing and Publishing, Nsukk.
[8] Olaitan, S.O., Asogwa, V.C. and Abu, M. (2011) Technology Competency Training Modules Required by Secondary School Graduates in E-Waste Management in Agribusiness. A paper presented at the Institute of Education, University of Nigeria Nsukka.
[9] Hornby, A.S. (2006) Oxford Learners Dictionary of Current English. Oxford University Press, London.
[10] Nwankwo, A. (2007). Requisite Skills in Soil Conservation Required for Equipping Secondary School Graduate for Profitable Crop Production in Abia State. Unpublished M.Ed Thesis, Department of Vocational Teacher Education, University of Nigeria, Nsukka.
[11] Azunku, P.N. (2008) Soil Conservation Skills Required by Students of Agriculture in Colleges of Education for Effective Teaching in South Eastern, Nigeria. Unpublished M.Ed Thesis, University of Nigeria, Nsukka.