APA (7th ed.) Citation

Gruppe, O. F. (1861). Demetrius. [s.n.].

Chicago Style (17th ed.) Citation

Gruppe, Otto Friedrich. Demetrius. Berlin: [s.n.], 1861.

MLA (9th ed.) Citation

Gruppe, Otto Friedrich. Demetrius. [s.n.], 1861.

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