Pungbangkadee, R., and A. Ratinthorn. “Factors and Consequences of Repeat Pregnancy Among Teenagers: A Case Study in Bangkok Metropolis”. Nursing Science Journal of Thailand, vol. 32, no. 2, Dec. 2014, pp. 23-31, https://he02.tci-thaijo.org/index.php/ns/article/view/27412.