APA (7th ed.) Citation

Hopper, G. M., & Mandell, S. L. (1987). Understanding computers (2nd ed.). West Pub. Co..

Chicago Style (17th ed.) Citation

Hopper, Grace Murray, and Steven L. Mandell. Understanding Computers. 2nd ed. St. Paul: West Pub. Co., 1987.

MLA (9th ed.) Citation

Hopper, Grace Murray, and Steven L. Mandell. Understanding Computers. 2nd ed. West Pub. Co., 1987.