Cita APA (7a ed.)

Hefner, P. (1993). The human factor: : evolution, culture and religion. Fortress Press.

Cita Chicago Style (17a ed.)

Hefner, Philip. The Human Factor: : Evolution, Culture and Religion. Minneapolis: Fortress Press, 1993.

Cita MLA (9a ed.)

Hefner, Philip. The Human Factor: : Evolution, Culture and Religion. Fortress Press, 1993.