APA Style
WORDPERFECT Workbook for IMB Personal Computers and PC Networks Version 5.1. (1989).
Utah:
WordPerfect Corporation.
Chicago Style
WORDPERFECT Workbook for IMB Personal Computers and PC Networks Version 5.1.
.
Utah:
WordPerfect Corporation,
1989.
Text.
MLA Style
WORDPERFECT Workbook for IMB Personal Computers and PC Networks Version 5.1.
.
Utah:
WordPerfect Corporation,
1989.
Text.
Turabian Style
WORDPERFECT Workbook for IMB Personal Computers and PC Networks Version 5.1.
Utah:
WordPerfect Corporation,
1989.
Print.