Wilkesmann, Zulnaidi Norhasnida, Alfredo Steinmayr, and Khaizura Heike Fischer. “Influence of Motivation on Academic Performance of Students in Germany”. Journal of Education 4, no. 6 (October 15, 2021): 1–9. Accessed July 23, 2025. https://stratfordjournalpublishers.org/journals/index.php/journal-of-education/article/view/955.