APA (7th ed.) Citation

Engert, J. Der naturalistiche Monismus Haeckels.

Chicago Style (17th ed.) Citation

Engert, Joseph. Der Naturalistiche Monismus Haeckels.

MLA (9th ed.) Citation

Engert, Joseph. Der Naturalistiche Monismus Haeckels.

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