Sahdila, Rizki, Sri Ramadhani, and Imsar. 2025. “Serving With Integrity: Service Ethics, Pricing Innovation, and Digital Marketing As Expressions of Islamic Economic Principles in Simalungun Regency”. Jurnal Ilmiah Mahasiswa Raushan Fikr 14 (2):413-24. https://doi.org/10.24090/jimrf.v14i2.15004.