Weerakkody, A., 2012. Which study design?. Sri Lanka Journal of Obstetrics and Gynaecology, 33(3), pp.135–138. DOI: http://doi.org/10.4038/sljog.v33i3.4025

Weerakkody A. Which study design?. Sri Lanka Journal of Obstetrics and Gynaecology. 2012;33(3):135–8. DOI: http://doi.org/10.4038/sljog.v33i3.4025

Weerakkody, A. (2012). Which study design?. Sri Lanka Journal of Obstetrics and Gynaecology, 33(3), 135–138. DOI: http://doi.org/10.4038/sljog.v33i3.4025

Weerakkody A, ‘Which Study Design?’ (2012) 33 Sri Lanka Journal of Obstetrics and Gynaecology 135 DOI: http://doi.org/10.4038/sljog.v33i3.4025

Weerakkody, Asoka. 2012. “Which Study Design?”. Sri Lanka Journal of Obstetrics and Gynaecology 33 (3): 135–38. DOI: http://doi.org/10.4038/sljog.v33i3.4025

Weerakkody, Asoka. “Which Study Design?”. Sri Lanka Journal of Obstetrics and Gynaecology 33, no. 3 (2012): 135–38. DOI: http://doi.org/10.4038/sljog.v33i3.4025

Weerakkody, A.. “Which Study Design?”. Sri Lanka Journal of Obstetrics and Gynaecology, vol. 33, no. 3, 2012, pp. 135–38. DOI: http://doi.org/10.4038/sljog.v33i3.4025