Syairozi, M Imam, Noer Rafikah zulyanti, and Ratna Handayati. 2017. “Analisis Efisiensi Perbankan Syariah (Unit Usaha Syariah) Indonesia Periode 2013-2015: Pendekatan Dea (Data Envelopment Analysis)”. Economic: Journal of Economic and Islamic Law 8 (2), 93-103. https://ejournal.kopertais4.or.id/tapalkuda/index.php/economic/article/view/2985.