APA引文

Loudon, I. (1986). Obstetric care, social class, and maternal mortality.

Citação norma Chicago

Loudon, I. Obstetric Care, Social Class, and Maternal Mortality. 1986.

MLA引文

Loudon, I. Obstetric Care, Social Class, and Maternal Mortality. 1986.

警告：這些引文格式不一定是100％准確.