Oktavianus, R. H., and D. Sulistiawan. “HEURISTIC THINKING ON DATA VISUALIZATION BASED ON DASHBOARD CASE STUDIES AT NATIONAL HOSPITAL SURABAYA”. JURNAL TEKNOLOGI DAN OPEN SOURCE, Vol. 4, no. 1, June 2021, pp. 106-13, doi:10.36378/jtos.v4i1.1311.