Larsen, G., & Leeburg, V. (1991). Using WordPerfect 5.1 on the PC: With data disk included. Mitchell McGraw-Hill.
Chicago Style (17th ed.) CitationLarsen, Gwynne, and Verlen Leeburg. Using WordPerfect 5.1 on the PC: With Data Disk Included. New York: Mitchell McGraw-Hill, 1991.
MLA (9th ed.) CitationLarsen, Gwynne, and Verlen Leeburg. Using WordPerfect 5.1 on the PC: With Data Disk Included. Mitchell McGraw-Hill, 1991.
Warning: These citations may not always be 100% accurate.