APA (7th ed.) Citation

Uschmann, G. (1961). Ernst Haeckel. Urania Verlag.

Chicago Style (17th ed.) Citation

Uschmann, Georg. Ernst Haeckel. Leipzig: Urania Verlag, 1961.

MLA (8th ed.) Citation

Uschmann, Georg. Ernst Haeckel. Urania Verlag, 1961.

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