HARDIANTO, T.; SUNDJAJA, A. M.; YULI, Y.; SAVINA, G. Pengaruh Gamifikasi terhadap Program Loyalitas pada Platform Tokopedia Indonesia. Prosiding SISFOTEK, [S. l.], v. 3, n. 1, p. 28 - 31, 2019. Disponível em: http://seminar.iaii.or.id/index.php/SISFOTEK/article/view/99. Acesso em: 21 oct. 2021.