Cita APA (7th ed.)

Diamond, j. (1999). Guns, Germs, and Steel. Norton.

Cita Chicago (17th ed.)

Diamond, jared. Guns, Germs, and Steel. New York: Norton, 1999.

Cita MLA (9th ed.)

Diamond, jared. Guns, Germs, and Steel. Norton, 1999.