APA (7th ed.) Citation

Wheeler, J. M. (2010). A Biographical Dictionary of Freethinkers of All Ages and Nations. Project Gutenberg.

Chicago Style (17th ed.) Citation

Wheeler, J. M. A Biographical Dictionary of Freethinkers of All Ages and Nations. Project Gutenberg, 2010.

MLA (9th ed.) Citation

Wheeler, J. M. A Biographical Dictionary of Freethinkers of All Ages and Nations. Project Gutenberg, 2010.

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