APA (7th ed.) Citation

Hobart, R. D., Octernaud, S., & Sytsma, S. (1991). Hands-on computing using WordPerfect 5.1. Macmillan.

Chicago Style (17th ed.) Citation

Hobart, R. Dale, Sharon Octernaud, and Sid Sytsma. Hands-on Computing Using WordPerfect 5.1. New York: Macmillan, 1991.

MLA (9th ed.) Citation

Hobart, R. Dale, et al. Hands-on Computing Using WordPerfect 5.1. Macmillan, 1991.