Cita APA (7a ed.)

Adams, R. G., & Blieszner, R. (1989). Older adult friendship: Structure and process. Sage.

Cita Chicago Style (17a ed.)

Adams, Rebecca G., y Rosemary Blieszner. Older Adult Friendship: Structure and Process. Newbury Park [etc.]: Sage, 1989.

Cita MLA (9a ed.)

Adams, Rebecca G., y Rosemary Blieszner. Older Adult Friendship: Structure and Process. Sage, 1989.