APA (7th ed.) Citation

Soénius, U. S., & Wilhelm, J. (2008). Kölner Personen-Lexikon. Greven.

Chicago Style (17th ed.) Citation

Soénius, Ulrich S., and Jürgen Wilhelm. Kölner Personen-Lexikon. Köln: Greven, 2008.

MLA (8th ed.) Citation

Soénius, Ulrich S., and Jürgen Wilhelm. Kölner Personen-Lexikon. Greven, 2008.

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