Permatasari, S. A. P., and R. T. Ratnasari. “THE EFFECT OF ISLAMIC WORK ETHICS ON EMPLOYEE LOYALTY OF YAYASAN NURUL HAYAT SURABAYA”. Jurnal Ekonomi Syariah Teori Dan Terapan, vol. 7, no. 5, July 2020, pp. 852-60, doi:10.20473/vol7iss20205pp852-860.