Hadjarati H, Ihsan F, Mokoagow A. Article RETRACTED due to malpractice Development of a traditional Langga martial arts-based Physical Education learning model to improve basic movement skills in upper-class elementary school students. Retos [Internet]. 2025 July 25 [cited 2026 Nov. 7];70:1064-78. Available from: https://www.revistaretos.org/index.php/retos/article/view/117109