Cita APA (7th ed.)
Walker, E. F. (1943). World crops derived from the Indians. Southwest Museum.
Cita Chicago (17th ed.)
Walker, Edwin F. World Crops Derived from the Indians. Los Angeles, California: Southwest Museum, 1943.
Cita MLA (9th ed.)
Walker, Edwin F. World Crops Derived from the Indians. Southwest Museum, 1943.
Atenció: Aquestes cites poden no estar 100% correctes.