Caniago, Abdi Samra, and Gadis Arniyati Athar. “Proof of the Accuracy of Calculation of Trigonometric Formulas for Spherical Triangles With Magnetic Declination Correction at Istiwa A’zam in Determining the Direction of the Qibla”. International Journal on Advanced Science, Education, and Religion 7, no. 4 (December 31, 2024): 166-177. Accessed May 7, 2026. http://ojs.staialfurqan.ac.id/IJoASER/article/view/761.