Citazione Stile APA (7a Edizione)

Weniger, D. (1969). Cacti of the Southwest: Texas, New Mexico, Oklahoma, Arkansas, and Louisiana. University of Texas Press.

Citazione stile Chigago Style (17a edizione)

Weniger, Del. Cacti of the Southwest: Texas, New Mexico, Oklahoma, Arkansas, and Louisiana. Austin: University of Texas Press, 1969.

Citatione MLA (9a ed.)

Weniger, Del. Cacti of the Southwest: Texas, New Mexico, Oklahoma, Arkansas, and Louisiana. University of Texas Press, 1969.