APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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