Sarif Y, Fadiawati N, Syamsuri MMF. The Effectiveness Of Waste Cooking Oil Recycling Project-Based Learning To Improve Students’ High Order Thingking Skills. Int. J. Chem. Educ. Res. [Internet]. 2019 Jul. 9 [cited 2024 Nov. 21];3(1):29-34. Available from: https://journal.uii.ac.id/IJCER/article/view/12749