Syarafina, Tesha, and Satya Aditya Wibowo. 2021. “Proposed Marketing Strategy for New Entry Markets in Breast Milk Courier Business (Case Study: Jesika by JNE)”. International Journal of Research in Engineering, Science and Management 4 (7): 1-4. https://journal.ijresm.com/index.php/ijresm/article/view/928.