Fitriani, Fitriani, Bustanul Arifin, Wan Zakaria, Hanung Ismono, and Rudi Hilmanto. 2018. “Coffee Agro Forestry Performance in Pulau Panggung Sub-District, Tanggamus, Lampung, Indonesia”. Pelita Perkebunan (a Coffee and Cocoa Research Journal) 34 (2), 69-79. https://doi.org/10.22302/iccri.jur.pelitaperkebunan.v34i2.300.