Cita APA (7a ed.)

Kass, L. R. (1988). Toward a more natural science: Biology and human affairs (1st Free Press pbk. ed.). Free Press.

Cita Chicago Style (17a ed.)

Kass, Leon R. Toward a More Natural Science: Biology and Human Affairs. 1st Free Press pbk. ed. New York: Free Press, 1988.

Cita MLA (9a ed.)

Kass, Leon R. Toward a More Natural Science: Biology and Human Affairs. 1st Free Press pbk. ed. Free Press, 1988.