Gaya APA
Catapult., ., Yuwono, W.
(1997).
Step by step microsoft excel 97
.
Jakarta:
PT.Elex Media Komputindo.
Gaya MLA
Catapult., ., Yuwono, Wiwiek..
"Step by step microsoft excel 97".
Jakarta:
PT.Elex Media Komputindo,
1997.
Printed Book.