Style de citation APA (7e éd.)

Ramírez-Herrera, C., Vargas-Hernández, J. J., & López-Upton, J. (2005). Distribution and conservation of natural populations of Pinus greggii. Instituto de Ecología, A.C.

Style de citation Chicago (17e éd.)

Ramírez-Herrera, C., J. J. Vargas-Hernández, et J. López-Upton. Distribution and Conservation of Natural Populations of Pinus Greggii. Instituto de Ecología, A.C, 2005.

Style de citation MLA (9e éd.)

Ramírez-Herrera, C., et al. Distribution and Conservation of Natural Populations of Pinus Greggii. Instituto de Ecología, A.C, 2005.