Cita APA (7a ed.)

Erwin, P. (1993). Friendship and peer relations in children. John Wiley & Sons.

Cita Chicago Style (17a ed.)

Erwin, Phil. Friendship and Peer Relations in Children. Chichester [etc.]: John Wiley & Sons, 1993.

Cita MLA (9a ed.)

Erwin, Phil. Friendship and Peer Relations in Children. John Wiley & Sons, 1993.