Lis, Andrzej. «The Manifestations of Positive Leadership Strategies in the Doctrinal Assumptions of the U.S. Army Leadership Concept». Journal of Corporate Responsibility and Leadership 2, no. 1 (marzo 9, 2016): 51–76. Accedido julio 6, 2025. https://apcz.umk.pl/JCRL/article/view/JCRL.2015.004.