Salma Rahmawati Ramadani, et al. “The Concept of Buying and Selling in Muamalah Fiqh: Study of Harmony, Transaction Terms and Prohibitions”. Kawakib: Journal of Multidisciplinary Research, vol. 2, no. 1, Oct. 2025, pp. 30-40, doi:10.63738/kawakib.v2i1.30.