APA引文

O'brien, B. (2009). General knowledge manual 2009. Cengage Learning.

Chicago Edition Citation

O'brien, Barry. General Knowledge Manual 2009. US: Cengage Learning, 2009.

MLA引文

O'brien, Barry. General Knowledge Manual 2009. Cengage Learning, 2009.

警告：這些引文格式不一定是100％准確.