RILA FAUZIAH; ZEFRIYENNI, Z. Analysis of Oligopsony Market Structure and Budget Allocation Efficiency for Educational Infrastructure Procurement at the Education Office of Bukittinggi City. Jurnal Multidisiplin Sahombu, [S. l.], v. 6, n. 03, p. 1150–1156, 2026. Disponível em: https://ejournal.seaninstitute.or.id/index.php/JMS/article/view/9009. Acesso em: 16 oct. 2026.