O'Leary, J. (2006). Centurion principles: Battlefied lessons for frontline leaders. Dorling Kindersley.
Chicago Style aipamenaO'Leary, Jeff. Centurion Principles: Battlefied Lessons for Frontline Leaders. New Delhi: Dorling Kindersley, 2006.
MLA aipamenaO'Leary, Jeff. Centurion Principles: Battlefied Lessons for Frontline Leaders. Dorling Kindersley, 2006.
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