Citazione Stile APA (7a Edizione)

Espejo Serna, A., López-Ferrari, A. R., Jiménez Machorro, R., Sánchez Saldaña, L., & García Cruz, J. (2002). Two new species of orchids from the state of Morelos, Mexico. Instituto de Ecología, A.C.

Citazione stile Chigago Style (17a edizione)

Espejo Serna, Adolfo, Ana Rosa López-Ferrari, Rolando Jiménez Machorro, Luis Sánchez Saldaña, e Javier García Cruz. Two New Species of Orchids from the State of Morelos, Mexico. Instituto de Ecología, A.C, 2002.

Citatione MLA (9a ed.)

Espejo Serna, Adolfo, et al. Two New Species of Orchids from the State of Morelos, Mexico. Instituto de Ecología, A.C, 2002.