Bustan, Davin Ramadhian, et al. “Analisis Strategi Pemasaran Biji Kopi Roasting Pada Pier Coffee Roasters Di Kota Yogyakarta Daerah Istimewa Yogyakarta”. Journal of Agricultural Social and Business, vol. 2, no. 2, Dec. 2023, pp. 37-44, https://jurnal.upnyk.ac.id/index.php/asb/article/view/10407.