Chuenkitiyanon, S., and P. Jantanakul. “Factors Associated With Unwanted Pregnancy Among Adolescent Women Receiving Prenatal Care at Krathumbaen Hospital, Samut Sakhon Province”. Journal of Nursing, Siam University, vol. 22, no. 43, Dec. 2021, pp. 62-76, https://he01.tci-thaijo.org/index.php/nursingsiamjournal/article/view/252773.