Geiyono, S., A. S. MUHAMMAD, and W. E. Yudiatmaja. “Collaboration and Knowledge Management in the Management of Zakat, Infaq and Alms in Tanjungpinang City”. Jurnal Ilmu Administrasi Negara (JUAN), vol. 6, no. 1, Oct. 2018, pp. 21-27, https://ojs.umrah.ac.id/index.php/juan/article/view/703.