Waal, F. B. M., Macedo, S., Ober, J., & Wright, R. (2006). Primates and philosophers: How morality evolved. Princeton University Press.
芝加哥风格引文Waal, Frans B. M., Stephen Macedo, Josiah Ober, 与 Robert Wright. Primates and Philosophers: How Morality Evolved. Princeton, N.J: Princeton University Press, 2006.
MLA引文Waal, Frans B. M., et al. Primates and Philosophers: How Morality Evolved. Princeton University Press, 2006.
警告：这些引文格式不一定是100％准确.