Editor, T., (2012). Answers to questions on study designs in the September issue. Sri Lanka Journal of Obstetrics and Gynaecology. 33(4), p.197. DOI: http://doi.org/10.4038/sljog.v33i4.4813

Editor T. Answers to questions on study designs in the September issue. Sri Lanka Journal of Obstetrics and Gynaecology. 2012;33(4):197. DOI: http://doi.org/10.4038/sljog.v33i4.4813

Editor, T. (2012). Answers to questions on study designs in the September issue. Sri Lanka Journal of Obstetrics and Gynaecology, 33(4), 197. DOI: http://doi.org/10.4038/sljog.v33i4.4813

Editor, The. 2012. Answers to questions on study designs in the September issue 33, no. 4: 197. DOI: http://doi.org/10.4038/sljog.v33i4.4813