Gaya APA
Wermers, E, E, R, L. (2007).
Microsoft Office Excel 2007: Illustrated Introductory .
:
Cengage Learning.
Gaya MLA
Wermers, Elizabeth, Eisner, Reding;, Lynn.
"Microsoft Office Excel 2007: Illustrated Introductory".
:
Cengage Learning,
2007.
Text.