Ambarwati, Rita, Andre Saputro, and Fathurochman. “Measurement Model For Competitive Advantage Of Product”. Umsida Press (September 22, 2021): 1–46. Accessed March 3, 2026. https://press.umsida.ac.id/index.php/umsidapress/article/view/978-623-7578-81-9.