APA-referens (7:e uppl.)

Bukowski, W. M., Hartup, W. W., & Newcomb, A. F. (1996). The company they keep: Friendship in childhood and adolescence. Cambridge University Press.

Chicago-referens (17:e uppl.)

Bukowski, William M., Willard W. Hartup, och Andrew F. Newcomb. The Company They Keep: Friendship in Childhood and Adolescence. Cambridge [England]: Cambridge University Press, 1996.

MLA-referens (9:e uppl.)

Bukowski, William M., et al. The Company They Keep: Friendship in Childhood and Adolescence. Cambridge University Press, 1996.