APA (7th ed.) Citation

Perry, A. L. (2013). Principles of Political Economy. Project Gutenberg.

Chicago Style (17th ed.) Citation

Perry, Arthur Latham. Principles of Political Economy. Project Gutenberg, 2013.

MLA (9th ed.) Citation

Perry, Arthur Latham. Principles of Political Economy. Project Gutenberg, 2013.

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