Cita APA (7th ed.)

Zamudio Ruiz, S., & Sanchez Martinez, E. (1995). A new species of Agave from subgenera Littaea (Agavaceae) from The Sierra Madre Oriental, Mexico. Instituto de Ecología, A.C.

Cita Chicago (17th ed.)

Zamudio Ruiz, Sergio, i Emiliano Sanchez Martinez. A New Species of Agave from Subgenera Littaea (Agavaceae) from The Sierra Madre Oriental, Mexico. Instituto de Ecología, A.C, 1995.

Cita MLA (9th ed.)

Zamudio Ruiz, Sergio, i Emiliano Sanchez Martinez. A New Species of Agave from Subgenera Littaea (Agavaceae) from The Sierra Madre Oriental, Mexico. Instituto de Ecología, A.C, 1995.