Cita APA

Spellenberg, R., Earle, C. J., Nelson, G., More, D., & Hughes, A. K. (2014). Trees of Western North America. Princeton University Press.

Citación estilo Chicago

Spellenberg, Richard, Christopher J. Earle, Gil Nelson, David More, and Amy K. Hughes. Trees of Western North America. Princeton, New Jersey: Princeton University Press, 2014.

Cita MLA

Spellenberg, Richard, et al. Trees of Western North America. Princeton University Press, 2014.