S. Wijaya, S. K. Notoprasetio, Y. J. Echarystio, and Y. Wibowo, “Restaurant Management’s Perspective on Halal Certification: An Exploratory Study in Surabaya, Indonesia”, Sriwijaya Int. J. of Dynamic Eco. And Buss., vol. 2, no. 2, pp. 165–176, Jul. 2018.