APA引文

BLUMENTHAL, J. C. (1973). English 2600: A programed course in grammar and usage.-- Ed. 4. Harcourt Brace Jovanovich.

芝加哥风格引文

BLUMENTHAL, Joseph C. English 2600: A Programed Course in Grammar and Usage.-- Ed. 4. New York: Harcourt Brace Jovanovich, 1973.

MLA引文

BLUMENTHAL, Joseph C. English 2600: A Programed Course in Grammar and Usage.-- Ed. 4. Harcourt Brace Jovanovich, 1973.

警告：这些引文格式不一定是100％准确.