Kadir Othman, A., A Rahman, M. K. and Abd, N. N. (2022) “Customer Engagement Index (CEI): The Assessment of Customers’ Willingness to Act as Companies’ Ambassadors”, International Journal of Academic Research in Progressive Education and Development, 11(3). Available at: https://ijarped.com/index.php/journal/article/view/1729 (Accessed: 1 August 2025).