APA (7th ed.) Citation

Key, E., Franzos, M., & Varnhagen, R. (1912). Rahel: Aine biographische Skizze. Thamm.

Chicago Style (17th ed.) Citation

Key, Ellen, Marie Franzos, and Rahel Varnhagen. Rahel: Aine Biographische Skizze. Halle a.S: Thamm, 1912.

MLA (8th ed.) Citation

Key, Ellen, et al. Rahel: Aine Biographische Skizze. Thamm, 1912.