Ahmad Faisal Mafahir, Rekha Ratri Julianti, Abdul Salam Hidayat. The Effect of the Problem-Based Learning Model on Breaststroke Swimming Instruction for Vocational High School Students. Magistra [Internet]. 2025 Oct. 17 [cited 2025 Oct. 23];12(1). Available from: https://journalmagistra.org/index.php/magistra/article/view/56