APA (7th ed.) Citation

Bruder, B., & Zapf. (2015). Cross worlds. KeRLE.

Chicago Style (17th ed.) Citation

Bruder, B., and Zapf. Cross Worlds. Freiburg ; Wien ; Basel: KeRLE, 2015.

MLA (9th ed.) Citation

Bruder, B., and Zapf. Cross Worlds. KeRLE, 2015.

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