APA ציטוט

Janzen, E. A. (1973). Heimlich chest drain valve used to treat pneumothorax.

Citação norma Chicago

Janzen, E A. Heimlich Chest Drain Valve Used to Treat Pneumothorax. 1973.

ציטוט MLA

Janzen, E A. Heimlich Chest Drain Valve Used to Treat Pneumothorax. 1973.