Fadrul, Fadrul, and Febdwi Suryani. “ANALYSIS CALCULATION OF COST OF PLAQUE PRODUCTION BY USING JOB ORDER COSTING METHOD ON PRINTING WF PEKANBARU”. PEKA, vol. 5, no. 2, Feb. 2018, pp. 136-44, https://journal.uir.ac.id/index.php/Peka/article/view/1191.