CHINNADURAI, M.; KALPANA, B. Promotional Strategies of Cellular Services : A Customer Perspective. Indian Journal of Marketing, [S. l.], v. 36, n. 5, 2006. Disponível em: https://indianjournalofcomputerscience.com/index.php/ijom/article/view/34323. Acesso em: 21 dec. 2025.