APA (7th ed.) Citation

Asbury, H. (1940). Gem of the prairie: An informal history of the Chicago underworld. Knopf.

Chicago Style (17th ed.) Citation

Asbury, Herbert. Gem of the Prairie: An Informal History of the Chicago Underworld. New York [u.a.]: Knopf, 1940.

MLA (9th ed.) Citation

Asbury, Herbert. Gem of the Prairie: An Informal History of the Chicago Underworld. Knopf, 1940.