Hardiansyah, S. ., N. Kusmaedi, A. Ma’mun, and A. Mahendra. “Physical Education Teachers’ Attitudes Towards Stimulating Higher Order Thinking Skills in Elementary School Students: Differences in Certified and Non-Certified Teachers”. Retos, vol. 54, May 2024, pp. 857-66, doi:10.47197/retos.v54.103844.