Wordperfect Corporation. (1989). WordPerfect Office for IBM personal computers. WordPerfect Corporation.
Citación estilo ChicagoWordperfect Corporation. WordPerfect Office for IBM Personal Computers. Utah: WordPerfect Corporation, 1989.
Cita MLAWordperfect Corporation. WordPerfect Office for IBM Personal Computers. WordPerfect Corporation, 1989.
Warning: These citations may not always be 100% accurate.