Cita APA (7a ed.)

Gentry, H. S. (1998). Agaves of Continental North America (2nd print.). Univ. of Arizona Press.

Cita Chicago Style (17a ed.)

Gentry, Howard Scott. Agaves of Continental North America. 2nd print. Tucson: Univ. of Arizona Press, 1998.

Cita MLA (8a ed.)

Gentry, Howard Scott. Agaves of Continental North America. 2nd print. Univ. of Arizona Press, 1998.