ROHMANA, Dana; CAHYADI, Nur. Analysis of Whatsapp Based Online Services Effectivity at Kmu Madura Eye Clinic. Eqien - Jurnal Ekonomi dan Bisnis, [S. l.], v. 11, n. 04, p. 43 – 48, 2022. DOI: 10.34308/eqien.v11i04.1201. Disponível em: https://www.stiemuttaqien.ac.id/ojs/index.php/OJS/article/view/1201. Acesso em: 27 aug. 2026.