APA (7th ed.) Citation

Walsh, J. J. (2011). The Century of Columbus. Project Gutenberg.

Chicago Style (17th ed.) Citation

Walsh, James J. The Century of Columbus. Project Gutenberg, 2011.

MLA (9th ed.) Citation

Walsh, James J. The Century of Columbus. Project Gutenberg, 2011.

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