MLA

Schmidt, Axel, et al. Community-acquired Pneumonia. Birkhäuser Basel, 2007.

APA

Schmidt, A., Marre, R., Suttorp, N., Welte, T., & Wolff, M. H. (2007). Community-Acquired Pneumonia. Birkhäuser Basel.

Chicago

Schmidt, Axel, Reinhard Marre, Norbert Suttorp, Tobias Welte, and Manfred H Wolff. Community-Acquired Pneumonia. : Birkhäuser Basel, 2007.