Siswanto, Agus, and Abdul Choliq Hidayat. 2019. “Analisys of The Quality of Customer Service Satisfactory of Baitul Maal Wattamwil (BMT) Tamzis at Daerah Istimewa Yogyakarta and Jawa Tengah”. INOBIS: Jurnal Inovasi Bisnis Dan Manajemen Indonesia 2 (2):152 -67. https://doi.org/10.31842/jurnal-inobis.v2i2.81.