F. Fitriani, “A Farmers’ Perspectives on the Threat of Unsustainable Risk of Coffee Farming in Lampung, Indonesia: Perspektif Petani Tentang Ancaman Risiko ketitidakberkelanjutan Usahatani Kopi di Lampung, Indonesia”, JPPT, vol. 22, no. 1, pp. 96-103, Jul. 2022.