APA (7th ed.) Citation

Webb, W. P. (1931). The great plains. Grosset and Dunlap.

Chicago Style (17th ed.) Citation

Webb, Walter Prescott. The Great Plains. New York, Estados Unidos: Grosset and Dunlap, 1931.

MLA (9th ed.) Citation

Webb, Walter Prescott. The Great Plains. Grosset and Dunlap, 1931.