Cita APA (7a ed.)

Kass, L. R. (1985). Toward a more natural science: Biology and human affairs. Free Press.

Cita Chicago Style (17a ed.)

Kass, Leon R. Toward a More Natural Science: Biology and Human Affairs. New York: Free Press, 1985.

Cita MLA (9a ed.)

Kass, Leon R. Toward a More Natural Science: Biology and Human Affairs. Free Press, 1985.