APA-viite (7. p.)

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.

Chicago-viite (17. p.)

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

MLA-viite (9. p.)

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