Ade Elza Surachman. PENGARUH BIAYA OPERASIONAL DAN BIAYA PROMOSI TERHADAP VOLUME PENJUALAN. CEMERLANG [Internet]. 2022 May 26 [cited 2026 Feb. 28];2(2):79-90. Available from: https://prin.or.id/index.php/cemerlang/article/view/280