P. Jitmanowan, C. Sopajaree, S. Utsaha, and T. Na phikun, “Effectiveness of using the Centering Teen Pregnancy Program on Postpartum Depression among Adolescent Mothers: A Posttest Only Quasi-experimental Design using a Comparison Group”, J Health Sci Med Res, vol. 37, no. 1, pp. 17–24, Dec. 2018.