APA (7th ed.) Citation

Engel, R. (1921). Über Operationen am Ductus choledochus.

Chicago Style (17th ed.) Citation

Engel, Rudolf. Über Operationen Am Ductus Choledochus. 1921.

MLA (9th ed.) Citation

Engel, Rudolf. Über Operationen Am Ductus Choledochus. 1921.

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