SERIN, Hamdi. The Use of Extrinsic and Intrinsic Motivations to Enhance Student Achievement in Educational Settings. International Journal of Social Sciences & Educational Studies, [S. l.], v. 5, n. 1, p. 191–194, 2018. DOI: 10.23918/ijsses.v5i1p191. Disponível em: https://ijsses.tiu.edu.iq/index.php/ijsses/article/view/670. Acesso em: 25 may. 2026.