APA (7e ed.) Bronvermelding

O'Leary, T. j., & Gardner, D. C. (1996). WordPerfect 6.1 for Windows: The visual learning guide. Prima Pub., McGraw-Hill.

Chicago (17e ed.) Bronvermelding

O'Leary, Timothy j., en David C. Gardner. WordPerfect 6.1 for Windows: The Visual Learning Guide. Rocklin, CA : New York: Prima Pub., McGraw-Hill, 1996.

MLA (8e ed.) Bronvermelding

O'Leary, Timothy j., en David C. Gardner. WordPerfect 6.1 for Windows: The Visual Learning Guide. Prima Pub., McGraw-Hill, 1996.