APA (7th ed.) Citation

Wirth, F. P. (1950). United States history. American Book Comp.

Chicago Style (17th ed.) Citation

Wirth, Fremont P. United States History. New York [u.a.]: American Book Comp, 1950.

MLA (9th ed.) Citation

Wirth, Fremont P. United States History. American Book Comp, 1950.