Citazione Stile APA (7a Edizione)

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.

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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