Gaya APA

Posner, B, Z., Kouzes, J, M. (2011). Credibility : how leaders gain and lose it, why people demand it . United States of America: Jossey-bass.

Gaya MLA

Posner, Barry, Z.., Kouzes, James, M.. "Credibility : how leaders gain and lose it, why people demand it". United States of America: Jossey-bass, 2011. .