Yan, Z. ., M. . Omar, F. M. . Kamaruzaman, and M. S. . Rasul. “The Influence of Extrinsic Learning Motivation on Vocational Students’ Learning Motivation: A Study of Regulation Types”. International Journal of Learning, Teaching and Educational Research, vol. 24, no. 5, May 2025, pp. 556-78, http://ijlter.myres.net/index.php/ijlter/article/view/2331.