APA (7th ed.) Citation

Helmer, K. [. Müll und Abfall - was tun?

Chicago Style (17th ed.) Citation

Helmer, Klaus [Red.]. Müll Und Abfall - Was Tun?

MLA (8th ed.) Citation

Helmer, Klaus [Red.]. Müll Und Abfall - Was Tun?

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