Sahdila, R. et al. 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 (Aug. 2025), 413–424. DOI:https://doi.org/10.24090/jimrf.v14i2.15004.