APA (7th ed.) Citation

Pyle, W. H. (2006). The Science of Human Nature A Psychology for Beginners. Project Gutenberg.

Chicago Style (17th ed.) Citation

Pyle, William Henry. The Science of Human Nature A Psychology for Beginners. Project Gutenberg, 2006.

MLA (9th ed.) Citation

Pyle, William Henry. The Science of Human Nature A Psychology for Beginners. Project Gutenberg, 2006.

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