Sulianto, Joko, Sunardi, Sri Anitah, Gunarhadi, and Ryzal Perdana. 2020. “Improvement of Student Reasoning Skills through the Development Model of Advance Organizer on Open Ended Approach”. International Journal of Psychosocial Rehabilitation 24 (1): 5203-15. https://doi.org/10.61841/bf2k6907.