1. Aboud, F., & Mendelson, M. (1996). Determinants of friendship selection and quality: Developmental perspectives. In W. M. Burkowski, A. F. Newcomb, & W. W. Hartup (Eds.), The company they keep: Friendship in childhood and adolescence (pp. 87–112). Cambridge University Press.
2. Acock, A., & Hurlbert, J. S. (1993). Social networks, marital status, and well-being. Social Networks, 15(3), 309–334. https://doi.org/10.1016/0378-8733(93)90010-I
3. Ainsworth, M. D. S. (1989). Attachments beyond infancy. American Psychologist, 44(4), 709–716. https://doi.org/10.1037/0003-066x.44.4.709
4. Adams, R. G., & Blieszner, R. (1994). An integrative conceptual framework for friendship research. Journal of Social and Personal Relationships, 11, 163–184.
5. Ajrouch, K. J., Antonucci, T. C., & Janevic, M. R. (2001). Social networks among Blacks and Whites: The interaction between race and age. Journals of Gerontology Series B-Psychological Sciences and Social Sciences, 56(2), S112–S118. https://doi.org/10.1093/geronb/56.2.s112