SINGHAL, S. Success and Failure of CRM Programme. Journal of Commerce and Trade , "Meerut, India", v. 8, n. 1-2, p. 98–101, 2013. DOI: 10.26703/jct.v8i1-2.291. Disponível em: https://jctindia.org/index.php/jct/article/view/ao13-ss. Acesso em: 20 apr. 2025.