Merjani, Abdullah, Reva Oktavia Ningrum, & Edi Sumarya. " ANALYSIS OF THE BLUE OCEAN STRATEGY ENGINEERING APPROACH TO INCREASE SALES IN BUSINESS COMPETITION (CASE TUDI ATAMATI COFFEE BATAM)." PROFISIENSI: Jurnal Program Studi Teknik Industri [Online], 10.2 (2022): 163-174. Web. 15 Feb. 2026