APA (7th ed.) Citation

Rutgers, L. V. (2009). Die Katakomben von Valkenburg.

Chicago Style (17th ed.) Citation

Rutgers, Leonard Victor. Die Katakomben Von Valkenburg. 2009.

MLA (9th ed.) Citation

Rutgers, Leonard Victor. Die Katakomben Von Valkenburg. 2009.

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