Hamzah, S.; Ani, F.; Halim, H.; Sholeh Saad, S.; Sarawati Johar, S.; Akmal Damin, Z.; Jaes, L.; Nubli Abdul Wahab, M. A Study on the Effect of Stroop Test on the Formation of Students Discipline by Using the Heart Rate Variability (HRV) Technique. IJET 2018, 7 (4.9), 178-181. https://doi.org/10.14419/ijet.v7i4.9.20668.