Napitupulu, S. 2022. Pengaruh Cost Leadership Dan Differentiation Strategy Terhadap Citra Produk PT. Asuransi Bumi Putra 1912. CAKRAWALA. 29, 2 (Jul. 2022), 1–10. DOI:https://doi.org/10.56070/cakrawala.v29i2.11.