PURWATI, Astri Ayu; FITRIO, Tomy; BEN, Frank; HAMZAH, Muhammad Luthfi. Product Quality and After-Sales Service in Improving Customer Satisfaction and Loyalty. Jurnal Economia, [S. l.], v. 16, n. 2, p. 223–235, 2020. DOI: 10.21831/economia.v16i2.31521. Disponível em: https://journal.uny.ac.id/index.php/economia/article/view/31521. Acesso em: 6 jun. 2025.