Gaya APA
Leeburg, V., Purvis, P.
(1994).
Using WordPerfect 6.0 for DOS
(
1)
.
San Francisco:
Mitchell Publishing, Inc.
Gaya MLA
Leeburg, Verlene., Purvis, Peggy.
"Using WordPerfect 6.0 for DOS".
1
San Francisco:
Mitchell Publishing, Inc,
1994.
Text.