Theslek, A., and E. PHOSAI. “Development of Learning Achievement on Parts of Speech through an Innovation Kit Integrated with the Yoniso-manasikara Principle for Grade 6 Students: Development of Learning Achievement on Parts of Speech through an Innovation Kit Integrated with the Yoniso-manasikara Principle for Grade 6 Students”. Mahachula Academic Journal, vol. 13, no. 2, Aug. 2026, pp. 107-21, https://so04.tci-thaijo.org/index.php/JMA/article/view/289408.