SUBAGIYO, A.; AFDHAL, A. F.; DERRIAWAN, D. The influence of product upgrading and quality on customer satisfaction and its impact on consumer loyalty standardized herbal medicine: Research on Tolak Angin Sido Muncul Product in DKI Jakarta. International journal of health & medical sciences, [S. l.], v. 3, n. 1, p. 136-145, 2020. DOI: 10.31295/ijhms.v3n1.330. Disponível em: https://sloap.org/journal/index.php/ijhms/article/view/330. Acesso em: 17 jul. 2024.