APA (7th ed.) Citation

Bowling, J. (2011). The Last of the Vikings. Project Gutenberg.

Chicago Style (17th ed.) Citation

Bowling, John. The Last of the Vikings. Project Gutenberg, 2011.

MLA (9th ed.) Citation

Bowling, John. The Last of the Vikings. Project Gutenberg, 2011.

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