Trisdiono, Harli, Siswandari Siswandari, Nunuk Suryani, and Soetarno Joyoatmojo. 2019. “Multidisciplinary Integrated Project-Based Learning to Improve Critical Thinking Skills and Collaboration”. International Journal of Learning, Teaching and Educational Research 18 (1):16-30. https://ijlter.myres.net/index.php/ijlter/article/view/602.