Adu-tutu Bofah, Emmanuel, and Forster D. Ntow. “Internal/external Frame of Reference: Exploring the Paradoxical Relations Between Mathematics and Self-Concept across 29 Countries: Internal/external Frame of Reference: Exploring the Paradoxical Relations Between Mathematics and Self-Concept across 29 Countries”. Ghana Journal of Education: Issues and Practice (GJE) 4 (December 1, 2017): 44–59. Accessed April 28, 2024. https://journal.ucc.edu.gh/index.php/gje/article/view/495.