I. Nuraeni, A. Rahayu, and P. D. Dirgantari, “Penerapan Blue Ocean Strategy pada Brontak Coffe di Kota Sumedang: Implementation of Blue Ocean Strategy at Brontak Coffe in Sumedang City”, ekomabis. :. J. ekonomi manaj. n.a., vol. 3, no. 01, pp. 93 - 103, Aug. 2022.