APA (7th ed.) Citation

Beckmann, V., & Shrader, C. (2012). Active galactic nuclei. Wiley-VCH.

Chicago Style (17th ed.) Citation

Beckmann, Volker, and Chris Shrader. Active Galactic Nuclei. Weinheim: Wiley-VCH, 2012.

MLA (9th ed.) Citation

Beckmann, Volker, and Chris Shrader. Active Galactic Nuclei. Wiley-VCH, 2012.

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