Wegner, Joanna. «The Manifestations of Positive Leader Roles in Classical Theories of Leadership». Journal of Corporate Responsibility and Leadership 3, no. 3 (febbraio 1, 2017): 91–105. Consultato luglio 23, 2024. https://apcz.umk.pl/JCRL/article/view/JCRL.2016.018.