APA引文

Duncan, J. M. (1874). Dr. Barnes on the Seat of the Placenta in Placenta Prævia.

Citação norma Chicago

Duncan, J. Matthews. Dr. Barnes On the Seat of the Placenta in Placenta Prævia. 1874.

MLA引文

Duncan, J. Matthews. Dr. Barnes On the Seat of the Placenta in Placenta Prævia. 1874.

警告：這些引文格式不一定是100％准確.