APA (7th ed.) Citation

Hallenberger, D. (2011). Die Gemeinschaft "Ruhrland".

Chicago Style (17th ed.) Citation

Hallenberger, Dirk. Die Gemeinschaft "Ruhrland". 2011.

MLA (9th ed.) Citation

Hallenberger, Dirk. Die Gemeinschaft "Ruhrland". 2011.

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