The Influence of Product, Price, Location and Promotion on Donut Purchasing Decisions at J.CO Donuts & Coffee Jember. jmaa [Internet]. 2023 Jun. 28 [cited 2026 Jul. 22];3(1):9-14. Available from: https://jmaa.polije.ac.id/index.php/journal/article/view/v3i1-b