Samosir, Christina Monika, and Tatang Herman. “STUDENTS’ WAYS OF UNDERSTANDING AND THINKING BASED ON HAREL’S THEORY IN SOLVING SET PROBLEMS”. JOHME: Journal of Holistic Mathematics Education 7, no. 2 (December 4, 2023): 169–179. Accessed February 23, 2025. http://ojs.uph.edu/index.php/JOHME/article/view/7422.