APA (7th ed.) Citation

Sommer, H. (1954). Vitamin B 12. Verlag Technik.

Chicago Style (17th ed.) Citation

Sommer, Hans. Vitamin B 12. Berlin: Verlag Technik, 1954.

MLA (8th ed.) Citation

Sommer, Hans. Vitamin B 12. Verlag Technik, 1954.

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