APA (7th ed.) Citation

Oppermann, E., Benda, A., Brenne, H., Haase, E., & Saupe, E. (1927). Erdkunde. Schroedel.

Chicago Style (17th ed.) Citation

Oppermann, Edmund, Alfred Benda, Heinrich Brenne, Ernst Haase, and Emil Saupe. Erdkunde. Halle (Saale): Schroedel, 1927.

MLA (9th ed.) Citation

Oppermann, Edmund, et al. Erdkunde. Schroedel, 1927.