APA (7th ed.) Citation

Popenoe, P., & Johnson, R. H. (2006). Applied Eugenics. Project Gutenberg.

Chicago Style (17th ed.) Citation

Popenoe, Paul, and Roswell H. Johnson. Applied Eugenics. Project Gutenberg, 2006.

MLA (9th ed.) Citation

Popenoe, Paul, and Roswell H. Johnson. Applied Eugenics. Project Gutenberg, 2006.

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