APA (7th ed.) Citation

Scott, E. L., & Valentine, A. C. (2009). How the Flag Became Old Glory. Project Gutenberg.

Chicago Style (17th ed.) Citation

Scott, Emma Look, and A. C. Valentine. How the Flag Became Old Glory. Project Gutenberg, 2009.

MLA (9th ed.) Citation

Scott, Emma Look, and A. C. Valentine. How the Flag Became Old Glory. Project Gutenberg, 2009.

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