APA (7th ed.) Citation

Robbins, W. W., Bellue, M. K., & Ball, W. S. (1941). Weeds of California. State dept. of agriculture.

Chicago Style (17th ed.) Citation

Robbins, Wilfred William, Margaret K. Bellue, and Walter Scott Ball. Weeds of California. Sacramento: State dept. of agriculture, 1941.

MLA (9th ed.) Citation

Robbins, Wilfred William, et al. Weeds of California. State dept. of agriculture, 1941.