APA (7th ed.) Citation

Wordperfect Corporation. (1989). WordPerfect Office for IBM personal computers. WordPerfect Corporation.

Chicago Style (17th ed.) Citation

Wordperfect Corporation. WordPerfect Office for IBM Personal Computers. Utah: WordPerfect Corporation, 1989.

MLA (9th ed.) Citation

Wordperfect Corporation. WordPerfect Office for IBM Personal Computers. WordPerfect Corporation, 1989.

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