Gaya APA

Blieszner, E, R, G, A, ;, R. (1989). Older adult friendship: structure and process (cet. 1). London: Sage Publications.

Gaya MLA

Blieszner, Ed., Rebecca, G., Adams, ;, Rosemary. "Older adult friendship: structure and process". cet. 1 London: Sage Publications, 1989. Text.