Retnawati, B. B. and Nuryakin, N. (2016) “Developing Salesperson Performance: The Role of Customer Encountering Competence Portfolio, Relational Capital and Service Excellent Customer Heterogeneity”, International Review of Management and Marketing, 6(4), pp. 891–897. Available at: https://econjournals.com/index.php/irmm/article/view/3093 (Accessed: 24 April 2024).