APA (7th ed.) Citation

Krämer, A., & Löffler, H. (2016). Cancer of unknown primary. Springer.

Chicago Style (17th ed.) Citation

Krämer, Alwin, and Harald Löffler. Cancer of Unknown Primary. Cham: Springer, 2016.

MLA (9th ed.) Citation

Krämer, Alwin, and Harald Löffler. Cancer of Unknown Primary. Springer, 2016.