Keeton, W. T. (1973). Elements of biological science (2d ed.). Norton National Book Store.
芝加哥风格引文Keeton, William T. Elements of Biological Science. 2d ed. New York, Manila: Norton National Book Store, 1973.
MLA引文Keeton, William T. Elements of Biological Science. 2d ed. Norton National Book Store, 1973.
警告：这些引文格式不一定是100％准确.