Setyawan Sukma, Andy Arciana Dodik, et al. “Self-Efficacy Training to Reduce Work Stress in Member of The Police Ditsabhara Regional Police Special Region of Yogyakarta”. Jurnal Psikologi, vol. 16, no. 1, Mar. 2020, pp. 51-64, https://ejournal.up45.ac.id/index.php/psikologi/article/view/675.