APA (7th ed.) Citation

Classen, M., Dammann, H. G., & Schepp, W. (1991). The ulcer patient in general practice. Hoechst.

Chicago Style (17th ed.) Citation

Classen, Meinhard, Hanns Gerd Dammann, and Wolfgang Schepp. The Ulcer Patient in General Practice. Munich: Hoechst, 1991.

MLA (8th ed.) Citation

Classen, Meinhard, et al. The Ulcer Patient in General Practice. Hoechst, 1991.