APA (7th ed.) Citation

Gruppe, O. F. (1852). Kaiser Karl. [s.n.].

Chicago Style (17th ed.) Citation

Gruppe, Otto Friedrich. Kaiser Karl. Berlin: [s.n.], 1852.

MLA (9th ed.) Citation

Gruppe, Otto Friedrich. Kaiser Karl. [s.n.], 1852.

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