APA (7th ed.) Citation

Babbel, F., Sander, W., & Flensburg, G. &. C. Flüchtlinge.

Chicago Style (17th ed.) Citation

Babbel, Fritz, Willi Sander, and Gebh. & Co Flensburg. Flüchtlinge.

MLA (8th ed.) Citation

Babbel, Fritz, et al. Flüchtlinge.