Saifudin, Saifudin, Aslam Fatkhudin, and Edy Subowo. 2019. “SISTEM INFORMASI GEOGRAFIS WISATA GUNUNG DI PEKALONGAN BERBASIS ANDROID”. Jurnal Surya Informatika 7 (1):20-27. https://doi.org/10.48144/suryainformatika.v7i1.344.