Pristiani, T., F. Rozci, and P. N. Indah. “Marketing Efficiency Analysis of Robusta Coffee Commodity in Dampit District, Malang Regency”. Indonesian Interdisciplinary Journal of Sharia Economics (IIJSE), Vol. 8, no. 2, May 2025, pp. 5602-15, doi:10.31538/iijse.v8i2.6137.