APA引文

Held, G. (2003). Understanding data communications (7th ed.). Pearson Education.

Chicago Edition Citation

Held, Gilbert. Understanding Data Communications. 7th ed. Delhi: Pearson Education, 2003.

MLA引文

Held, Gilbert. Understanding Data Communications. 7th ed. Pearson Education, 2003.

警告：这些引文格式不一定是100％准确.