APA (7th ed.) Citation

United States. Department of the Interior. (1927). Heroes of American democracy. GPO.

Chicago Style (17th ed.) Citation

United States. Department of the Interior. Heroes of American Democracy. [Washington]: GPO, 1927.

MLA (9th ed.) Citation

United States. Department of the Interior. Heroes of American Democracy. GPO, 1927.

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