O'Leary, T. j., & Gardner, D. C. (1996). WordPerfect 6.1 for Windows: The visual learning guide. Prima Pub., McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)O'Leary, Timothy j., agus David C. Gardner. WordPerfect 6.1 for Windows: The Visual Learning Guide. Rocklin, CA : New York: Prima Pub., McGraw-Hill, 1996.
Lua MLA (8ú heag.)O'Leary, Timothy j., agus David C. Gardner. WordPerfect 6.1 for Windows: The Visual Learning Guide. Prima Pub., McGraw-Hill, 1996.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.