Daza-Rodríguez, M.E., Daza-Porto, M.I. and Pérez-Orozco, A.B. (2017) “Customer service: a management strategy for increasing organizational competitiveness in Valledupar companies (Colombia)”., AiBi Journal of Research, Administration and Engineering, 5(1), pp. 20–26. doi:10.15649/2346030X.425.