APA (7th ed.) Citation

Hulme, F. E. (2012). The Flags of the World Their History, Blazonry, and Associations. Project Gutenberg.

Chicago Style (17th ed.) Citation

Hulme, F. Edward. The Flags of the World Their History, Blazonry, and Associations. Project Gutenberg, 2012.

MLA (9th ed.) Citation

Hulme, F. Edward. The Flags of the World Their History, Blazonry, and Associations. Project Gutenberg, 2012.

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