APA (7th ed.) Citation

Otis, J. (2013). The Boy Spies with the Regulators. Project Gutenberg.

Chicago Style (17th ed.) Citation

Otis, James. The Boy Spies with the Regulators. Project Gutenberg, 2013.

MLA (9th ed.) Citation

Otis, James. The Boy Spies with the Regulators. Project Gutenberg, 2013.

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