NAZIR, A.; WIDODO, A.; BARSAH, A. The Influence of Leadership Style and Work Environment Against Work Ethic and Tutoring at PKBM in Tangerang City. Jurnal MANDIRI: Ilmu Pengetahuan, Seni, dan Teknologi, v. 5, n. 1, p. 21 - 30, 30 jun. 2021.