McIntyre, K. B. (2011). Herbert Butterfield: History, providence, and skeptical politics. ISI Books.
Citazione stile Chigago Style (17a edizione)McIntyre, Kenneth B. Herbert Butterfield: History, Providence, and Skeptical Politics. Wilmington, Delaware: ISI Books, 2011.
Citatione MLA (9a ed.)McIntyre, Kenneth B. Herbert Butterfield: History, Providence, and Skeptical Politics. ISI Books, 2011.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.