APA (7th ed.) Citation

Walker, E. F. (1967). World crops derived from the Indians (4th ed.). Southwest Museum.

Chicago Style (17th ed.) Citation

Walker, Edwin Francis. World Crops Derived from the Indians. 4th ed. Los Angeles, Calif.: Southwest Museum, 1967.

MLA (9th ed.) Citation

Walker, Edwin Francis. World Crops Derived from the Indians. 4th ed. Southwest Museum, 1967.