Hart, W. L. (1969). Essentials of algebra. Prindle, Weber and Schmidt, Inc.
芝加哥风格引文Hart, William L. Essentials of Algebra. Boston, Massachusetts: Prindle, Weber and Schmidt, Inc, 1969.
MLA引文Hart, William L. Essentials of Algebra. Prindle, Weber and Schmidt, Inc, 1969.
警告：这些引文格式不一定是100％准确.