Sahdila, R., Ramadhani, S., & 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), 413–424. https://doi.org/10.24090/jimrf.v14i2.15004