APA (7th ed.) Citation

Bartelmann, M. (2009). Next challenges. Questions of modern cosmology.

Chicago Style (17th ed.) Citation

Bartelmann, Matthias. "Next Challenges." Questions of Modern Cosmology 2009.

MLA (9th ed.) Citation

Bartelmann, Matthias. "Next Challenges." Questions of Modern Cosmology, 2009.

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