Suroto, A., & Waluyo, B. (2010). Perencanaan Pengembangan Objek Wisata Waduk Serba Guna Gajah Mungkur. Jurnal Pariwisata Indonesia, 6(1), 6–13. Retrieved from http://jurnal.stpsahidsurakarta.ac.id/index.php/JPI/article/view/78