Damanik, Naro Laurensia, and Acep Samsudin. 2023. “Product Life Cycle (PLC) Dan Matriks Boston Consulting Group (BCG) (Studi Pada Usaha Kosmetik Julius Pasar Parluasan Pematangsiantar)”. Management Studies and Entrepreneurship Journal (MSEJ) 4 (3):2601-14. https://doi.org/10.37385/msej.v4i3.2078.