Singer, P. (1991). In defence of animals.
Chicago Edition CitationSinger, Peter. In Defence of Animals. Blackwell Publishers, Oxford, 1991.
MLA引文Singer, Peter. In Defence of Animals. 1991.
警告：这些引文格式不一定是100％准确.
APA引文
Singer, P. (1991). In defence of animals.
Chicago Edition CitationSinger, Peter. In Defence of Animals. Blackwell Publishers, Oxford, 1991.
MLA引文Singer, Peter. In Defence of Animals. 1991.