Cita APA (7th ed.)
Benjamin, P. (1973). How in the world? Standard Publishing.
Cita Chicago (17th ed.)
Benjamin, Paul. How in the World? Cincinnati: Standard Publishing, 1973.
Cita MLA (9th ed.)
Benjamin, Paul. How in the World? Standard Publishing, 1973.
Atenció: Aquestes cites poden no estar 100% correctes.