Erlisda Wahyuni, Supentri. Upaya Meningkatkan Motivasi Belajar PPKN dengan Model Pembelajaran Problem Based Learning Setelah Covid-19 di SMPN 2 Siak-Riau. JISHUM [Internet]. 2022 Oct. 19 [cited 2024 Dec. 27];1(2):132-5. Available from: https://journal.ikmedia.id/index.php/jishum/article/view/31