Kurniawan, K., Y. Iskandar, and A. Zulfikri. “Marketing Analysis Identify Internal and External Factors of Coffee Products (Mountain Karamat Village, Sukabumi District)”. West Science Business and Management, vol. 1, no. 01, Jan. 2023, pp. 37-41, https://wsj.westscience-press.com/index.php/wsbm/article/view/21.