APA (7th ed.) Citation

Robbins, J. (1990). WordPerfect 5.1: Step-by-step. Howard W. Sams & Co.

Chicago Style (17th ed.) Citation

Robbins, Judd. WordPerfect 5.1: Step-by-step. Indianapolis: Howard W. Sams & Co, 1990.

MLA (9th ed.) Citation

Robbins, Judd. WordPerfect 5.1: Step-by-step. Howard W. Sams & Co, 1990.

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