APA

Anderson E. F., Brown R. & Barthlott W. (2001). The cactus family. Portland, Oregon: Timber Press.

Chicago

Anderson Edward F, Brown Roger and Barthlott Wilhem. 2001. The cactus family. Portland, Oregon: Timber Press.

Harvard

Anderson E. F., Brown R. and Barthlott W. (2001). The cactus family. Portland, Oregon: Timber Press.

MLA

Anderson Edward F, Brown Roger and Barthlott Wilhem. The cactus family. Portland, Oregon: Timber Press. 2001.