APA (7th ed.) Citation

Momigliano, E., & Ewers-Bumiller, J. (1939). Friedrich Barbarossa. Siegismund.

Chicago Style (17th ed.) Citation

Momigliano, Eucardio, and Josephine Ewers-Bumiller. Friedrich Barbarossa. Berlin: Siegismund, 1939.

MLA (9th ed.) Citation

Momigliano, Eucardio, and Josephine Ewers-Bumiller. Friedrich Barbarossa. Siegismund, 1939.

Warning: These citations may not always be 100% accurate.