Cita APA (7a ed.)

Paul, E. F., Miller, F. D., & Paul, J. (1993). Altruism. University Press.

Cita Chicago Style (17a ed.)

Paul, Ellen Frankel, Fred Dycus Miller, y Jeffrey Paul. Altruism. Cambridge: University Press, 1993.

Cita MLA (9a ed.)

Paul, Ellen Frankel, et al. Altruism. University Press, 1993.