APA (7th ed.) Citation

Leffingwell, A. (2006). An Ethical Problem Or, Sidelights upon Scientific Experimentation on Man and Animals. Project Gutenberg.

Chicago Style (17th ed.) Citation

Leffingwell, Albert. An Ethical Problem Or, Sidelights upon Scientific Experimentation on Man and Animals. Project Gutenberg, 2006.

MLA (9th ed.) Citation

Leffingwell, Albert. An Ethical Problem Or, Sidelights upon Scientific Experimentation on Man and Animals. Project Gutenberg, 2006.

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