APA (7th ed.) Citation

Friend, G., Fike, J., & Baker, H. (1988). Understanding data communications (2a ed.). Howard W. Sams & Company.

Chicago Style (17th ed.) Citation

Friend, G.E, J.L Fike, and H.C Baker. Understanding Data Communications. 2a ed. Indianapolis: Howard W. Sams & Company, 1988.

MLA (9th ed.) Citation

Friend, G.E, et al. Understanding Data Communications. 2a ed. Howard W. Sams & Company, 1988.