Marlina, Yeni, Idqan Fahmi, and Arif Satria. “Customer Discovery of Biofertilizer Business (A Lesson From PT PHN Experience)”. Jurnal Manajemen & Agribisnis 15, no. 2 (July 15, 2018): 107. Accessed May 3, 2024. https://jai.ipb.ac.id/index.php/jmagr/article/view/18862.