R. Winarni, M. R. E. Widuatie, N. Sasmita, and E. C. Endrayadi, “Coffee, Community, and Capitalism: Analyzing Worker Economic Strategies at Blawan Plantation in East Java (2016-2022)”, yupa. hist. stud. j., vol. 9, no. 1, pp. 38–59, Mar. 2025.