Casper, L. 1. (1999). The circular firing squad. Giraffe Books.
芝加哥风格引文Casper, Leonard 1923. The Circular Firing Squad. Quezon City: Giraffe Books, 1999.
MLA引文Casper, Leonard 1923. The Circular Firing Squad. Giraffe Books, 1999.
警告：这些引文格式不一定是100％准确.