APA (7th ed.) Citation

Gallagher, W. (2016). How the post office created America: A history. Penguin Press.

Chicago Style (17th ed.) Citation

Gallagher, Winifred. How the Post Office Created America: A History. New York: Penguin Press, 2016.

MLA (8th ed.) Citation

Gallagher, Winifred. How the Post Office Created America: A History. Penguin Press, 2016.

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