APA (7th ed.) Citation

Friend, G. E. (1984). Understanding Data Communications. Howard W. Sams & Co.

Chicago Style (17th ed.) Citation

Friend, George E. Understanding Data Communications. Howard W. Sams & Co, 1984.

MLA (8th ed.) Citation

Friend, George E. Understanding Data Communications. Howard W. Sams & Co, 1984.

Warning: These citations may not always be 100% accurate.