Indra Kusuma, Septian, and Apriani Dorkas Rambu Atahau. “Islamic Commercial Banks and Sharia Business Units; How Efficient Are They? ”. Jurnal Organisasi Dan Manajemen, vol. 15, no. 2, Sept. 2019, pp. 141-52, doi:10.33830/jom.v15i2.733.2019.