Cohn, P. M. (1965). Universal algebra. Harper & Row John Weatherhill, Inc.
芝加哥风格引文Cohn, P. M. Universal Algebra. New York, Tokyo: Harper & Row John Weatherhill, Inc, 1965.
MLA引文Cohn, P. M. Universal Algebra. Harper & Row John Weatherhill, Inc, 1965.
警告：这些引文格式不一定是100％准确.