Kirom, M. Z., U. S. Ardi, and Z. Fitria. “Analysis Of Hilal Image Processing Method At Lembaga Falakiyah Nahdlatul Ulama Ponorogo”. KULMINASI: Journal of Falak and Sharia, vol. 2, no. 2, Dec. 2024, pp. 86-100, doi:10.22373/kulminasi.v2i2.6046.