Utomo, Prio, and Sholihah Maratus. “The Effectiveness of Using Educational Cinema Techniques to Increase students’ Self-Confidence: An Experimental Research”. ProGCouns: Journal of Professionals in Guidance and Counseling, vol. 2, no. 2, Aug. 2021, pp. 51-61, doi:10.21831/progcouns.v2i2.41101.