Cita APA (7th ed.)
Gilliam, H., & Bry, M. (1966). The natural world of San Francisco. Doubleday.
Cita Chicago (17th ed.)
Gilliam, Harold, i Michael Bry. The Natural World of San Francisco. New York: Doubleday, 1966.
Cita MLA (9th ed.)
Gilliam, Harold, i Michael Bry. The Natural World of San Francisco. Doubleday, 1966.
Atenció: Aquestes cites poden no estar 100% correctes.