APA (7th ed.) Citation

McGuinn, R. (2003). Twelve Gates to the City. Project Gutenberg.

Chicago Style (17th ed.) Citation

McGuinn, Roger. Twelve Gates to the City. Project Gutenberg, 2003.

MLA (9th ed.) Citation

McGuinn, Roger. Twelve Gates to the City. Project Gutenberg, 2003.

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