APA aipamena

 Heldman, K. (2007).  Excel 2007 for project managers.  Wiley Pub.

Chicago Style aipamena

 Heldman, Kim.  Excel 2007 for Project Managers.  Wiley Pub, 2007.

MLA aipamena

 Heldman, Kim.  Excel 2007 for Project Managers.  Wiley Pub, 2007.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.