APA (7th ed.) Citation

Colantonio Ernest S. (1989). Using WordPerfect 5: Software guide. Heath.

Chicago Style (17th ed.) Citation

Colantonio Ernest S. Using WordPerfect 5: Software Guide. Heath, 1989.

MLA (8th ed.) Citation

Colantonio Ernest S. Using WordPerfect 5: Software Guide. Heath, 1989.

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