APA (7th ed.) Citation

Wallace, F. W. (2012). The Viking Blood A Story of Seafaring. Project Gutenberg.

Chicago Style (17th ed.) Citation

Wallace, Frederick William. The Viking Blood A Story of Seafaring. Project Gutenberg, 2012.

MLA (9th ed.) Citation

Wallace, Frederick William. The Viking Blood A Story of Seafaring. Project Gutenberg, 2012.

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