Ahmad Faisal Mafahir, Rekha Ratri Julianti, dan Abdul Salam Hidayat. “The Effect of the Problem-Based Learning Model on Breaststroke Swimming Instruction for Vocational High School Students”. Magistra : Jurnal Keguruan dan Ilmu Pendidikan 12, no. 1 (Oktober 17, 2025). Diakses Oktober 23, 2025. https://journalmagistra.org/index.php/magistra/article/view/56.