Klomyong, Sinaporn, Wantana Supaseemanont, and Wannee Deoisres. 2020. “Factors Influencing Qualified Antenatal Care Visits Among Pregnant Adolescents”. Journal of Phrapokklao Nursing College, Chanthaburi 31 (2). Chanthaburi, Thailand:41–56. https://he01.tci-thaijo.org/index.php/pnc/article/view/188611.