Não informado. (1968). Singapore journal of obstetrics and gynaecology. Obstetrical and Gynaecological Society of Singapore.
Citação do estilo Chicago (17ª ed.)Não informado. Singapore Journal of Obstetrics and Gynaecology. Singapore: Obstetrical and Gynaecological Society of Singapore, 1968.
Citação MLA (8ª ed.)Não informado. Singapore Journal of Obstetrics and Gynaecology. Obstetrical and Gynaecological Society of Singapore, 1968.
警告：这些引文格式不一定是100％准确.