APA引文

Smith, M. L., Spencer, S. A., & Hull, D. (1980). Mode of delivery and survival in babies weighing less than 2000 g at birth.

Citação norma Chicago

Smith, M L., S A. Spencer, and D. Hull. Mode of Delivery and Survival in Babies Weighing Less Than 2000 G At Birth. 1980.

MLA引文

Smith, M L., S A. Spencer, and D. Hull. Mode of Delivery and Survival in Babies Weighing Less Than 2000 G At Birth. 1980.