Retnawati BB, Nuryakin N. Developing Salesperson Performance: The Role of Customer Encountering Competence Portfolio, Relational Capital and Service Excellent Customer Heterogeneity. IRMM [Internet]. 2016 Oct. 25 [cited 2024 Nov. 22];6(4):891-7. Available from: https://econjournals.com./index.php/irmm/article/view/3093