APA (7th ed.) Citation

Webber, J. M. (1953). Yuccas of the southwest. U.S. Dept. of Agriculture.

Chicago Style (17th ed.) Citation

Webber, John Milton. Yuccas of the Southwest. [Washington, D.C.]: U.S. Dept. of Agriculture, 1953.

MLA (9th ed.) Citation

Webber, John Milton. Yuccas of the Southwest. U.S. Dept. of Agriculture, 1953.