Citazione APA

Beard, C. A., & Beard, M. R. B. (1960). Beard's New basic History of the United States (2nd ed.). Double day.

Stile di citazione Chicago

Beard, Charles A., e Mary R Beard Beard. Beard's New Basic History of the United States. 2nd ed. New York: Double day, 1960.

Citazione MLA

Beard, Charles A., e Mary R Beard Beard. Beard's New Basic History of the United States. 2nd ed. Double day, 1960.