APA (7th ed.) Citation

Wagner, P., Fischer, H., Geistbeck, A., & Geistbeck, M. (1914). Europa. Oldenbourg.

Chicago Style (17th ed.) Citation

Wagner, Paul, Heinrich Fischer, Alois Geistbeck, and Michael Geistbeck. Europa. München [u.a.]: Oldenbourg, 1914.

MLA (9th ed.) Citation

Wagner, Paul, et al. Europa. Oldenbourg, 1914.