Devila, R. . ANALISIS HUBUNGAN PROMOSI TERHADAP VOLUME PENJUALAN SEMEN TONASA DI WILAYAH PASAR KALIMANTAN TIMUR: ANALYSIS OF PROMOTION RELATIONSHIP ON TONASA CEMENT SALES VOLUME IN EAST KALIMANTAN MARKET AREA. ECO BUSI ENTRE FINA 2023, 3, 146-153.