Safa’at, S., N. . Fatimah, and L. A. . Manafe. “Marketing Strategy To Improve The Competitiveness Of A Chocolate Drink Business In Surabaya”. International Journal Of Education, Social Studies, And Management (IJESSM), vol. 3, no. 1, Feb. 2023, pp. 13-27, doi:10.52121/ijessm.v3i1.135.