See WordPerfect Office and WordPerfect Corporation.
"Corel WordPerfect." YourDictionary, n.d. Web. 22 June 2018. <http://www.yourdictionary.com/corel-wordperfect>.
Corel WordPerfect. (n.d.). Retrieved June 22nd, 2018, from http://www.yourdictionary.com/corel-wordperfect
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