APA (7th ed.) Citation

Benson, L. D. (1950). The cacti of Arizona (2nd ed.). University of Arizona Press.

Chicago Style (17th ed.) Citation

Benson, Lyman David. The Cacti of Arizona. 2nd ed. Tucson: University of Arizona Press, 1950.

MLA (9th ed.) Citation

Benson, Lyman David. The Cacti of Arizona. 2nd ed. University of Arizona Press, 1950.