APA (7th ed.) Citation

Heuss, T., Eichler, W., & Besson, W. (1971). Friedrich Ebert 1871/1971.

Chicago Style (17th ed.) Citation

Heuss, Theodor, Willi Eichler, and Waldemar Besson. Friedrich Ebert 1871/1971. 1971.

MLA (8th ed.) Citation

Heuss, Theodor, et al. Friedrich Ebert 1871/1971. 1971.