Rakhmadi, A.J., Akrim, A. and Syafruddin, M. 2022. The contribution of Abdul Raouf Al-Sinkaili (d.1693) to Astronomy and Calender (the Study of Philology of book entitled "Risalah fi at-Taqwim". IJISH (International Journal of Islamic Studies and Humanities). 5, 1 (Oct. 2022), 79–103. DOI:https://doi.org/10.26555/ijish.v5i1.3255.