APA (7th ed.) Citation

Frey, E. (1939). Die Chirurgie des Herzens. Enke.

Chicago Style (17th ed.) Citation

Frey, Emil. Die Chirurgie Des Herzens. Stuttgart: Enke, 1939.

MLA (9th ed.) Citation

Frey, Emil. Die Chirurgie Des Herzens. Enke, 1939.

Warning: These citations may not always be 100% accurate.