APA (7th ed.) Citation

Ellwood, C. A. (2004). Sociology and Modern Social Problems. Project Gutenberg.

Chicago Style (17th ed.) Citation

Ellwood, Charles A. Sociology and Modern Social Problems. Project Gutenberg, 2004.

MLA (9th ed.) Citation

Ellwood, Charles A. Sociology and Modern Social Problems. Project Gutenberg, 2004.

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