Charles Augusto Ortiz Briceño, Luis Miguel Romero Echevarria, Martin William Huisa Huahuasoncco, Nataly Silvia Garcia Vilca, and Denilson Medina Sanchez. “Customer Service Management Strategies for Loyalty: A Systematic Review”. International Journal of Medical Toxicology and Legal Medicine 27, no. 4s (November 22, 2024): 239–247. Accessed December 5, 2025. http://ijmtlm.org/index.php/journal/article/view/845.