Cita APA (7a ed.)

Hernandez, H. M., & Godinez A., H. (1994). Contribution to the knowledge of threatened Mexican cacti. Instituto de Ecología, A.C.

Cita Chicago Style (17a ed.)

Hernandez, Hector M., y Hector Godinez A. Contribution to the Knowledge of Threatened Mexican Cacti. Instituto de Ecología, A.C, 1994.

Cita MLA (9a ed.)

Hernandez, Hector M., y Hector Godinez A. Contribution to the Knowledge of Threatened Mexican Cacti. Instituto de Ecología, A.C, 1994.