Mohd Balwi, M. A. W. F., S. Sarif, and A. Lubis. “AUTHORITY DELEGATION IN ORGANIZATION: LESSONS FROM 7TH CENTURY – EARLY ISLAMIC ERA”. Journal of Al-Tamaddun, vol. 13, no. 1, June 2018, pp. 1-11, doi:10.22452/JAT.vol13no1.1.