Collard, D. A. (1978). Altruism and economy: A study in non-selfish economics. Martin Robertson.
芝加哥风格引文Collard, David A. Altruism and Economy: A Study in Non-selfish Economics. Oxford: Martin Robertson, 1978.
MLA引文Collard, David A. Altruism and Economy: A Study in Non-selfish Economics. Martin Robertson, 1978.
警告：这些引文格式不一定是100％准确.