Citazione Stile APA (7a Edizione)

ROBERT, S., & FLAHERTY, J. E. (1963). Basic facts of U.S. history. Collier Books.

Citazione stile Chigago Style (17a edizione)

ROBERT, Sobel, e John E. FLAHERTY. Basic Facts of U.S. History. New York: Collier Books, 1963.

Citatione MLA (9a ed.)

ROBERT, Sobel, e John E. FLAHERTY. Basic Facts of U.S. History. Collier Books, 1963.