Citazione Stile APA (7a Edizione)

Wirth, F. P. (1955). United States history (Revised ed.). American Book Comp.

Citazione stile Chigago Style (17a edizione)

Wirth, Fremont P. United States History. Revised ed. New York [u.a.]: American Book Comp, 1955.

Citatione MLA (9a ed.)

Wirth, Fremont P. United States History. Revised ed. American Book Comp, 1955.