Punsuwun, Sasinun, Khwanjit Mahakittikun, Pitphan Uthchachon, and Uncharee Kanathum. 2017. “Effects of Positive Self-talk Training Program on Self-esteem and Psychological Well-being Among Pregnant Adolescents”. Journal of Research in Nursing-Midwifery and Health Sciences 37 (2):77-89. https://he02.tci-thaijo.org/index.php/nur-psu/article/view/91405.