Grunebaum, J. O. (2003). Friendship: Liberty, equality, and utility. State University of New York Press.
芝加哥风格引文Grunebaum, James O. Friendship: Liberty, Equality, and Utility. Albany: State University of New York Press, 2003.
MLA引文Grunebaum, James O. Friendship: Liberty, Equality, and Utility. State University of New York Press, 2003.
警告：这些引文格式不一定是100％准确.