Lubis, Yusrizal, and Diana Suita. “KAJIAN PERBANDINGAN OPTIMALISASI PENJADWALAN DAN BIAYA PROYEK DENGAN METODE LEAST COST SCHEDULING”. Jurnal Simetri Rekayasa, vol. 2, no. 2, Oct. 2020, pp. 154-9, https://jurnal.harapan.ac.id/index.php/JSR/article/view/680.