Suswati L, Nainggolan NP. The Influence of Product Variations, Digital Marketing and Brand Image on the Purchase Decision of Janji Jiwa Coffee in Batam. DRB [Internet]. 2024 Mar. 11 [cited 2024 Dec. 22];7(2):295-307. Available from: https://openjournal.unpam.ac.id/index.php/DRB/article/view/37565