Citazione Stile APA (7a Edizione)

John Ferguson,H, & McHenry, D. E. The American System of Government. Oxford University Press.

Citazione stile Chigago Style (17a edizione)

John Ferguson,H, e Dean E. McHenry. The American System of Government. Oxford: Oxford University Press.

Citatione MLA (9a ed.)

John Ferguson,H, e Dean E. McHenry. The American System of Government. Oxford University Press.