Widodo, Pradipta. “ANALISIS STRATEGI BLUE OCEAN ‘PT HANJAYA MANDALA SAMPOERNA TBK’”. JMBI UNSRAT (Jurnal Ilmiah Manajemen Bisnis dan Inovasi Universitas Sam Ratulangi). 11, no. 1 (March 28, 2024): 496–504. Accessed October 4, 2024. https://ejournal.unsrat.ac.id/v3/index.php/jmbi/article/view/53827.