Kitiyodom, S. “Maternal Youth and Pregnancy Outcomes: Early and Middle adolescent Versus Late Adolescent Compared with Women beyond the Teen Years”. Maharat Nakhon Ratchasima Hospital Journal, vol. 36, no. 2, Sept. 2024, pp. 113-20, https://he04.tci-thaijo.org/index.php/MNRHJ/article/view/1698.