Ramadhan, Munawwir. 2022. “The Zakat of Crab Trading According to Imam Asy-Syafi’I and Imam Ibn Hazmin (A Case Study of Tanjungbalai Asahan)”. Eqien - Jurnal Ekonomi Dan Bisnis 9 (2):340 – 349. https://doi.org/10.34308/eqien.v9i2.416.