Irfan I, Rokhmat J, Verawati NNSP. Development of Pictorial Riddle-Based Guided Inquiry Model Learning Devices to Improve Students’ Problem Solving Ability. JPPFI [Internet]. 2023Jun.26 [cited 2024May10];5(1). Available from: http://jpfis.unram.ac.id/index.php/jppfi/article/view/206