Sirited, P. .; Khamsaart, J. .; Saelao, A. .; Saengsahwat, K. .; Nutkasem, W. .; Sawasdee, A. .; Waijampa, T. . Effect of Application of Self-Efficacy Theory on Life Skills in Preventing Sexual Risk Behavior of Early Adolescents in Phetchaburi Province. J.PH.PL 2021, 7, 327-346.