APA Style
Wordperfect version 6.0 : reference. (1993).
Utah:
Wordperfect Corporation.
Chicago Style
Wordperfect version 6.0 : reference.
1.
Utah:
Wordperfect Corporation,
1993.
Text.
MLA Style
Wordperfect version 6.0 : reference.
1.
Utah:
Wordperfect Corporation,
1993.
Text.
Turabian Style
Wordperfect version 6.0 : reference.
Utah:
Wordperfect Corporation,
1993.
Print.