App, S. (2011). Discrete Mathematics with Applications (4th.). Cengage.
芝加哥风格引文App, Susanna. Discrete Mathematics with Applications. 4th. Cengage, 2011.
MLA引文App, Susanna. Discrete Mathematics with Applications. 4th. Cengage, 2011.
警告：这些引文格式不一定是100％准确.