“Price Volatility of Cooking Oil in Jambi Province Across Four Market Levels: A Structural Break Approach”, j.sos.ekon.pertan., vol. 21, no. 3, hlm. 33–48, Des 2025, Diakses: Agu 20, 2026. Tersedia pada: https://journal.unhas.ac.id/index.php/jsep/article/view/47326