Yuhanda, I., A. Yulfa, D. Hermon, ja Y. Antomi. ”WEB-GIS Based School Zone Determination in Sungai Penuh City”. European Journal of Life Safety and Stability (2660-9630), vsk. 22, marraskuuta 2022, ss. 82-87, http://www.ejlss.indexedresearch.org/index.php/ejlss/article/view/848.