APA引文

Barnes, R. (1887). On the Causes, Internal and External, of Puerperal Fever.

Citação norma Chicago

Barnes, Robert. On the Causes, Internal and External, of Puerperal Fever. 1887.

MLA引文

Barnes, Robert. On the Causes, Internal and External, of Puerperal Fever. 1887.

警告：這些引文格式不一定是100％准確.