American Veterinary Medical Association (2007) US Pet Ownership & Demographics Sourcebook.
 Krause-Parello, C.A. (2008) The Mediating Effect of Pet Attachment Support between Loneliness and General Health in Older Females Living in the Community. Journal of Community Health Nursing, 25, 1-14.
 Krause-Parello, C.A. (2012) Pet Ownership and Older Women: The Relationships among Loneliness, Pet Attachment Support, Human Social Support, and Depressed Mood. Geriatric Nursing, 33, 194-203.
 Walsh, F. (2009) Human-Animal Bonds II: The Role of Pets in Family Systems and Family Therapy. Family Process, 48, 481-499.
 Albert, A. and Bulcroft, K. (1988) Pets, Families, and the Life Course. Journal of Marriage and Family, 50, 543-552.
 Cain, A.O. (1985) Pets as Family Members. Marriage & Family Review, 8, 5-10.
 American Pet Products Manufacturers Association (2011) National Pet Owners Survey (NPOS).
 Rosenberg, M.J. and Hovland, C.I. (1960) Cognitive, Affective and Behavioral Components of Attitudes. In: Rosenberg, M.J. and Hovland, C.I., Eds., Attitude Organization and Change: An Analysis of Consistency among Attitude Components, Yale University Press, New Haven.
 Dykstra, P.A. and Wagner, M. (2007) Pathways to Childlessness and Late-Life Outcomes. Journal of Family Issues, 28, 1487-1517.
 Gormly, A.V., Gormly, J.B. and Weiss, H. (1987) Motivations for Parenthood among Young Adult College Students. Sex Roles, 16, 31-39.
 Duvall Antonacopoulos, N.M. and Pychyl, T.A. (2010) An Examination of the Potential Role of Pet Ownership, Human Social Support and Pet Attachment in the Psychological Health of Individuals Living Alone. Anthrozoos: A Multi-disciplinary Journal of the Interactions of People & Animals, 38, 37-54.
 Goldmeier, J. (1986) Pets or People: Another Research Note. The Gerontologist, 26, 203-206.
 Rew, L. (2000) Friends and Pets as Companions: Strategies for Coping with Loneliness among Homeless Youth. Journal of Child and Adolescent Psychiatric Nursing, 13, 125-132.
 Zasloff, R.L. and Kidd, A.H. (1994) Loneliness and Pet Ownership among Single Women. Psychological Reports, 75, 747-752.
 Wesley, Y. (2003) Desire for Children among Black Women with and without HIV Infection. Journal of Nursing Scholarship, 35, 37-43.
 Russell, D., Peplau, L.A. and Cutrona, C.E. (1980) The Revised UCLA Loneliness Scale: Concurrent and Discriminant Validity Evidence. Journal of Personality and Social Psychology, 39, 472-480.
 Wei, M., Russell, D.W. and Zakalik, R.A. (2005) Adult Attachment, Social Self-Efficacy, Self-Disclosure, Loneliness, and Subsequent Depression for Freshman College Students: A Longitudinal Study. Journal of Counseling Psychology, 52, 602-614.
 Krause-Parello, C.A. (2009) Relationships among Pet Attachment Support and Human Health Outcomes in Women of Color. In: Wesley, Y., Ed., African American Women and Health, Nova Science Publishers, Inc., New York, 243-257.
 Brown, S.E. (2002) Ethnic Variations in Pet Attachment among Students at an American School of Veterinary Medicine. Society and Animals, 10, 249-266.
 Yang, J. (2005) ASIAN POP Putting on the Dog. San Francisco Chronicle.
 El-Alayli, A., Lystad, A.L., Webb, S.R., Hollingsworth, S.L. and Ciolli, J.L. (2006) Reigning Cats and Dogs: A Pet-Enhancement Bias and Its Link to Pet Attachment, Pet-Self Similarity, Self-Enhancement, and Well-Being. Basic and Applied Social Psychology, 28, 131-143.