Gunawan, D. A. ., R. D. . Ramajati, . I. M. Arif, and . Q. F. . C.W. “Inventory of Herpetofauna Types in Banyak Angkrem Hills and Kedung Kopong Salaman, Magelang”. Proceeding International Conference on Science and Engineering, vol. 4, Feb. 2021, pp. 119-21, https://sunankalijaga.org/prosiding/index.php/icse/article/view/640.