Caplan, A. L. (1981). Ethics in hard times. Plenum Press.
芝加哥风格引文Caplan, Arthur L. Ethics in Hard Times. New York [u.a.]: Plenum Press, 1981.
MLA引文Caplan, Arthur L. Ethics in Hard Times. Plenum Press, 1981.
警告：这些引文格式不一定是100％准确.
APA引文