APA (7th ed.) Citation

Haeckel, O., Haeckel, G., & Zettler, H. (1991). Sport in Berlin: 1910 - 1914. Nishen.

Chicago Style (17th ed.) Citation

Haeckel, Otto, Georg Haeckel, and Hela Zettler. Sport in Berlin: 1910 - 1914. Berlin: Nishen, 1991.

MLA (8th ed.) Citation

Haeckel, Otto, et al. Sport in Berlin: 1910 - 1914. Nishen, 1991.