Sriyasak, Atcharawadee, Phatcharee Chookanhom, and Chaweewan Sridawrung. 2020. “Application of Transition Theory in Becoming Teenage Parents”. Journal of The Royal Thai Army Nurses 21 (2):1-8. https://he01.tci-thaijo.org/index.php/JRTAN/article/view/226756.