DELIMA, Christian M. The Efficiency of Hand Tricks in Learning Trigonometric Ratios. International Journal of Multidisciplinary: Applied Business and Education Research, Malang, Indonesia, v. 3, n. 12, p. 2692–2698, 2022. DOI: 10.11594/ijmaber.03.12.21. Disponível em: https://ijmaberjournal.org/index.php/ijmaber/article/view/770. Acesso em: 14 feb. 2026.