APA (7th ed.) Zitazioa

Greenfield, J. (2001). Challenges of leadership: C E O exchange. Films Media Group.

Chicago Style (17th ed.) Zitazioa

Greenfield, Jeff. Challenges of Leadership: C E O Exchange. Hamilton, NJ: Films Media Group, 2001.

MLA (9th ed.) Zitazioa

Greenfield, Jeff. Challenges of Leadership: C E O Exchange. Films Media Group, 2001.