Subandi, Daniel, and Friska Natalia. “Analysis and Design Web Based System in LPPM UMN”. Ultima InfoSys : Jurnal Ilmu Sistem Informasi 6, no. 2 (December 31, 2015): 125-129. Accessed February 28, 2020. http://ejournals.umn.ac.id/index.php/SI/article/view/228.