APA (7th ed.) Citation

Grontzki, K. (1987). "Willkommen in Deci ...".

Chicago Style (17th ed.) Citation

Grontzki, Karlheinz. "Willkommen in Deci ...". 1987.

MLA (9th ed.) Citation

Grontzki, Karlheinz. "Willkommen in Deci ...". 1987.

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