Sirited, P. , Khamsaart, J. , Saelao, A. , Saengsahwat, K. , Nutkasem, W. , Sawasdee, A. and Waijampa, T. 2021. Effect of Application of Self-efficacy Theory on Life Skills in Preventing Sexual Risk Behavior of Early Adolescents in Phetchaburi Province. Public Health Policy and Laws Journal. 7, 2 (May 2021), 327–346.