APA (7th ed.) Citation

Derra, E. (1965). Herzchirurgie. Boehringer.

Chicago Style (17th ed.) Citation

Derra, Ernst. Herzchirurgie. Ingelheim am Rhein: Boehringer, 1965.

MLA (9th ed.) Citation

Derra, Ernst. Herzchirurgie. Boehringer, 1965.

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