APA (7th ed.) Citation

Dykes, D. L. (1991). An easy course in using WordPerfect: Versions 5.0 and 5.1 for IBM-compatible computers. Grapevine Publications.

Chicago Style (17th ed.) Citation

Dykes, David L. An Easy Course in Using WordPerfect: Versions 5.0 and 5.1 for IBM-compatible Computers. Corvallis, OR: Grapevine Publications, 1991.

MLA (9th ed.) Citation

Dykes, David L. An Easy Course in Using WordPerfect: Versions 5.0 and 5.1 for IBM-compatible Computers. Grapevine Publications, 1991.

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