Ishmah, J.S., Rahayuningsih, I. and Sholichah, I.F. 2023. The Influence Self Confidence and Peer Social Support towards Optimism In Vocational High School X In Gresik. Psycho Holistic. 5, 1 (May 2023), 38–50. DOI:https://doi.org/10.35747/ph.v5i1.635.