Citazione APA

Beard, C. A., & Beard, M. R. (1944). A basic history of the United States. New Home Library.

Stile di citazione Chicago

Beard, Charles A., e Mary Ritter Beard. A Basic History of the United States. New York: New Home Library, 1944.

Citazione MLA

Beard, Charles A., e Mary Ritter Beard. A Basic History of the United States. New Home Library, 1944.