OMS. (1981). Recent advances in fertility regulation. Genève: OMS.
Trích dẫn kiểu ChicagoOMS. Recent Advances in Fertility Regulation. Genève: OMS, 1981.
MLA引文OMS. Recent Advances in Fertility Regulation. Genève: OMS, 1981.
警告：這些引文格式不一定是100％准確.
APA引文