Lieberman, L. (1992). Preparation for the CLEP, College-Level Examination Program: The 5 general examinations (3rd ed.). Arco : Prentice Hall.
芝加哥风格引文Lieberman, Leo. Preparation for the CLEP, College-Level Examination Program: The 5 General Examinations. 3rd ed. New York: Arco : Prentice Hall, 1992.
MLA引文Lieberman, Leo. Preparation for the CLEP, College-Level Examination Program: The 5 General Examinations. 3rd ed. Arco : Prentice Hall, 1992.
警告：这些引文格式不一定是100％准确.