APA (7th ed.) Citation

Spengler, W., Blume, O., & Meyer, W. Atout Bac. Mentor Verlag.

Chicago Style (17th ed.) Citation

Spengler, Wolfgang, Otto-Michael Blume, and Wolfgang Meyer. Atout Bac. München: Mentor Verlag.

MLA (9th ed.) Citation

Spengler, Wolfgang, et al. Atout Bac. Mentor Verlag.