APA (7th ed.) Citation

Buchanan, T., & Fisher, H. (2009). Making People Happy. Project Gutenberg.

Chicago Style (17th ed.) Citation

Buchanan, Thompson, and Harrison Fisher. Making People Happy. Project Gutenberg, 2009.

MLA (9th ed.) Citation

Buchanan, Thompson, and Harrison Fisher. Making People Happy. Project Gutenberg, 2009.

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