APA Citation

Schidt, R. F. C. (1920). Ernst Heinrich Haeckel: An appreciation. [Chicago?.

Chicago Style Citation

Schidt, Richard Francis Conrad. Ernst Heinrich Haeckel: An Appreciation. [Chicago?, 1920.

MLA Citation

Schidt, Richard Francis Conrad. Ernst Heinrich Haeckel: An Appreciation. [Chicago?, 1920.

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