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, New Jersey: Princeton University Press, 2014.
Cita MLA (9a ed.)
Spellenberg, Richard, et al. Trees of Western North America. Princeton University Press, 2014.
Precaución: Estas citas no son 100% exactas.