Παραπομπή σε μορφή APA (7η εκδ.)

Ubben, G. C., & Hughes, L. W. (1997). The principal: Creative leadership for effective schools (3rd ed.). Allyn & Bacon.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Ubben, Gerald C., και Larry W. Hughes. The Principal: Creative Leadership for Effective Schools. 3rd ed. Boston: Allyn & Bacon, 1997.

Παραπομπή σε μορφή MLA (9th εκδ.)

Ubben, Gerald C., και Larry W. Hughes. The Principal: Creative Leadership for Effective Schools. 3rd ed. Allyn & Bacon, 1997.