APA (7th ed.) Citation

Hobbie, M. D., Beck, B., & Pickavet, G. (1993). WordPerfect 6 quick reference. Que Corporation.

Chicago Style (17th ed.) Citation

Hobbie, Margaret D., Bob Beck, and Gary Pickavet. WordPerfect 6 Quick Reference. Carmel: Que Corporation, 1993.

MLA (9th ed.) Citation

Hobbie, Margaret D., et al. WordPerfect 6 Quick Reference. Que Corporation, 1993.