Albert, Albert, Bonnarty Steven Silalahi, Casslyn Chandriani, Clarecia Aurelia, and Zackrey Collins Willim. 2023. “Kajian Sikap Egois Terhadap Pengembangan Kepemimpinan Bisnis”. Innovative: Journal Of Social Science Research 3 (6):10406-17. https://j-innovative.org/index.php/Innovative/article/view/2584.