APA (7th ed.) Citation

SpringerLink (Online service), Bär, C., & Fredenhagen, K. (2009). Quantum Field Theory on Curved Spacetimes: Concepts and Mathematical Foundations. Springer Berlin Heidelberg.

Chicago Style (17th ed.) Citation

SpringerLink (Online service), Christian Bär, and Klaus Fredenhagen. Quantum Field Theory on Curved Spacetimes: Concepts and Mathematical Foundations. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009.

MLA (8th ed.) Citation

SpringerLink (Online service), et al. Quantum Field Theory on Curved Spacetimes: Concepts and Mathematical Foundations. Springer Berlin Heidelberg, 2009.

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