APA

Wempen F., . (2010). Learning mircrosoft office excel 2010. Upper Saddle River: Prentice Hall.

Chicago

Wempen Faithe, . 2010. Learning mircrosoft office excel 2010. Upper Saddle River: Prentice Hall.

Harvard

Wempen F., . (2010). Learning mircrosoft office excel 2010. Upper Saddle River: Prentice Hall.

MLA

Wempen Faithe, . Learning mircrosoft office excel 2010. Upper Saddle River: Prentice Hall. 2010.