Cita APA (7a ed.)

Midlarsky, E., & Kahana, E. (1994). Altruism in later life. Sage.

Cita Chicago Style (17a ed.)

Midlarsky, Elizabeth, y Eva Kahana. Altruism in Later Life. Thousand Oaks, California [etc.]: Sage, 1994.

Cita MLA (9a ed.)

Midlarsky, Elizabeth, y Eva Kahana. Altruism in Later Life. Sage, 1994.