Sitinjak W, Lubis Z, Sibuea MB, Saragih JR, Aulia MR, Sibuea FA. Market Integration and Price Transmission of Robusta Coffee in North Sumatra Province with the World Market. Agro. Bali. Agric. J. [Internet]. 2026 Aug. 14 [cited 2026 Oct. 23];9(2):517-30. Available from: https://www.ejournal.unipas.ac.id/index.php/Agro/article/view/2849