Gaya APA
Wordperfect workbook for ibm personal computers. (1989).
Malang:
Wordperfect Coorporation.
Gaya Chicago
Wordperfect workbook for ibm personal computers.
.
Malang:
Wordperfect Coorporation,
1989.
Text.
Gaya MLA
Wordperfect workbook for ibm personal computers.
.
Malang:
Wordperfect Coorporation,
1989.
Text.
Gaya Turabian
Wordperfect workbook for ibm personal computers.
Malang:
Wordperfect Coorporation,
1989.
Print.