APA (7th ed.) Citation

(2018). 641420.pdf. W. Bertelsmann Verlag.

Chicago Style (17th ed.) Citation

641420.pdf. W. Bertelsmann Verlag, 2018.

MLA (8th ed.) Citation

641420.pdf. W. Bertelsmann Verlag, 2018.

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