1. BPS-Statistics Indonesia, Indonesian Coffee Statistics (BPS-Statistics Indonesia, Jakarta, 2020).
2. The Indonesia Competition Commission (KPPU), Executive Summary of Business Actor Research and Market Structure on Coffee Commodities (The Indonesia Competition Commission, Jakarta, 2020)
3. Rudito E.W. Kurniawan, Rahman M., Pengetahuan Bahan Hasil Perkebunan dan Teknologi Pascapanen (TANESA, Samarinda, 2021)
4. Tucker C.M., Coffee Culture Local Experiences, Global Connections Second Edition (Routledge, New York City, 2017)
5. Folmer B., The Craft and Science of Coffee (Elsevier, Amsterdam, 2016)