APA (7th ed.) Citation

Hälschner, H. (1867). Ueber das Duell. Friderichs.

Chicago Style (17th ed.) Citation

Hälschner, Hugo. Ueber Das Duell. Elberfeld: Friderichs, 1867.

MLA (9th ed.) Citation

Hälschner, Hugo. Ueber Das Duell. Friderichs, 1867.

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