APA (7th ed.) Citation

Nicolay, J. G., & Hay, J. (2004). Abraham Lincoln, a History - Volume 02. Project Gutenberg.

Chicago Style (17th ed.) Citation

Nicolay, John G., and John Hay. Abraham Lincoln, a History - Volume 02. Project Gutenberg, 2004.

MLA (9th ed.) Citation

Nicolay, John G., and John Hay. Abraham Lincoln, a History - Volume 02. Project Gutenberg, 2004.

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