APA aipamena

 Hybels, S. (2007).  Communicating effectively.  McGraw-Hill.

Chicago Style aipamena

 Hybels, Saundra.  Communicating Effectively.  McGraw-Hill, 2007.

MLA aipamena

 Hybels, Saundra.  Communicating Effectively.  McGraw-Hill, 2007.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.