Hudha, Safa’at Ariful, and Djemari Mardapi. “Developing an Instrument for Measuring the Spiritual Attitude of High School Students”. REID (Research and Evaluation in Education) 4, no. 1 (July 1, 2018): 35–44. Accessed May 10, 2025. https://journal.uny.ac.id/index.php/reid/article/view/20304.