Cita APA (7a ed.)

Wahl, H. (1986). Psychology and aging. Assoc.

Cita Chicago Style (17a ed.)

Wahl, Hans-Werner. Psychology and Aging. Arlington, Va: Assoc, 1986.

Cita MLA (9a ed.)

Wahl, Hans-Werner. Psychology and Aging. Assoc, 1986.