Wildan W, Supriadi S, Laksmiwati D, Analita RN. Environmental chemistry course assisted problem-based learning in developing students’ higher-order thinking skills and characters. Acta.Chim.Asiana [Internet]. 2021 Oct. 26 [cited 2024 May 16];4(2):141-6. Available from: http://aca.unram.ac.id/index.php/ACA/article/view/54