Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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

Attenzione: Queste citazioni potrebbero non essere precise al 100%.