Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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