Abidin, H., and A. Rohmah. “Analisis Jumlah Pengunjung Dan Jumlah Wisata Terhadap PAD Kabupaten Lamongan”. UJMC (Unisda Journal of Mathematics and Computer Science), Vol. 6, no. 01, June 2020, pp. 33-38, doi:https://doi.org/10.52166/ujmc.v6i01.2385.