APA (7th ed.) Citation

Dümmler, E., & Köpke, R. (1876). Kaiser Otto der Grosse. Duncker & Humblot.

Chicago Style (17th ed.) Citation

Dümmler, Ernst, and Rudolf Köpke. Kaiser Otto Der Grosse. Leipzig: Duncker & Humblot, 1876.

MLA (9th ed.) Citation

Dümmler, Ernst, and Rudolf Köpke. Kaiser Otto Der Grosse. Duncker & Humblot, 1876.

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