Spellenberg, R., Earle, C. J., Nelson, G., More, D., & Hughes, A. K. (2014). Trees of Western North America. Princeton University Press.
芝加哥风格引文Spellenberg, Richard, Christopher J. Earle, Gil Nelson, David More, 与 Amy K. Hughes. Trees of Western North America. Princeton, New Jersey: Princeton University Press, 2014.
MLA引文Spellenberg, Richard, et al. Trees of Western North America. Princeton University Press, 2014.
警告：这些引文格式不一定是100％准确.