Cita APA (7a ed.)
Gentry, H. S. Agaves of Continental North America. University of Arizona.
Cita estilo Chicago (17a ed.)
Gentry, Howard Scott. Agaves of Continental North America. Tucson, EUA: University of Arizona.
Cita MLA (9a ed.)
Gentry, Howard Scott. Agaves of Continental North America. University of Arizona.
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