APA (7th ed.) Citation

O'Hagan, T. (2011). Songs of Heroic Days. Project Gutenberg.

Chicago Style (17th ed.) Citation

O'Hagan, Thomas. Songs of Heroic Days. Project Gutenberg, 2011.

MLA (9th ed.) Citation

O'Hagan, Thomas. Songs of Heroic Days. Project Gutenberg, 2011.

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