Taufik, Muhammad. “ESAIN ANCANG ANGUN ENGEMBANGAN ISTIM NFORMASI ALAN (Studi asus alan abupaten acitan)”. GEOID 4, no. 2 (February 1, 2009): 196–200. ccessed December 16, 2025. https://journal.its.ac.id/index.php/geoid/article/view/1274.