Athief, Fauzul Hanif Noor, Darlin Rizki, Ulin Nuha, and Adityo Wiwit Kurniawan. 2022. “The Service Strategy Used by Yayasan Kemanusiaan Kotak Amal Indonesia in Maintaining Donor Loyalty”. Insight Management Journal 3 (1):31-39. https://doi.org/10.47065/imj.v3i1.217.