Cita APA (7a ed.)

Gregor, T. A. (1996). A natural history of peace. Vanderbilt University Press.

Cita Chicago Style (17a ed.)

Gregor, Thomas A. A Natural History of Peace. Nashville [etc.]: Vanderbilt University Press, 1996.

Cita MLA (9a ed.)

Gregor, Thomas A. A Natural History of Peace. Vanderbilt University Press, 1996.