MLA

Michael Demuth, Bert-Wolfgang Schulze, Ingo Witt, et al. Partial Differential Equations and Spectral Theory. Springer Basel, 2011.

APA

Michael Demuth, I. Witt, Demuth, M., Schulze, B., & Witt, I. (2011). Partial Differential Equations and Spectral Theory. Springer Basel.

Chicago

Michael Demuth, Bert-Wolfgang Schulze, Ingo Witt, Michael Demuth, Bert-Wolfgang Schulze, and Ingo Witt. Partial Differential Equations and Spectral Theory. : Springer Basel, 2011.