Hidayat, A, A Munandar, and W Surakusumah. “Implementation of Project Based Learning by Utilizing Mangrove Ecosystem to Improve Students Creative Thinking Skills”. International Conference on Mathematics and Science Education of Universitas Pendidikan Indonesia 3 (December 1, 2018): 70-74. Accessed February 20, 2020. http://science.conference.upi.edu/proceeding/index.php/ICMScE/article/view/168.