APA
(1987). Journal of Obstetrics and Gynecology Survey. London: Academic Press.
Chicago
1987. Journal of Obstetrics and Gynecology Survey. London: Academic Press.
Harvard
(1987). Journal of Obstetrics and Gynecology Survey. London: Academic Press.
MLA
Journal of Obstetrics and Gynecology Survey. London: Academic Press. 1987.
