APA (7th ed.) Citation

Tufts, J. H. (2009). The Ethics of Coöperation. Project Gutenberg.

Chicago Style (17th ed.) Citation

Tufts, James Hayden. The Ethics of Coöperation. Project Gutenberg, 2009.

MLA (9th ed.) Citation

Tufts, James Hayden. The Ethics of Coöperation. Project Gutenberg, 2009.

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