A HUFRON; ABD. HANNAN; ABDUL WAHID. COLLECTIVE LEADERSHIP IN ISLAMIC BOARDING SCHOOLS: A MULTI-SITE STUDY AT SUMBER PAYUNG AL AFIQI, AL HASYIMI, BABUSSALAM, AS SYUKRI, AND ATTABRANI. re-JIEM (Research Journal of Islamic Education Management), v. 7, n. 2, p. 264-278, 25 Dec. 2024.