McIntyre, K. B. (2011). Herbert Butterfield: History, providence, and skeptical politics. ISI Books.
Lua i Stíl Chicago (17ú heag.)McIntyre, Kenneth B. Herbert Butterfield: History, Providence, and Skeptical Politics. Wilmington, Delaware: ISI Books, 2011.
Lua MLA (9ú heag.)McIntyre, Kenneth B. Herbert Butterfield: History, Providence, and Skeptical Politics. ISI Books, 2011.
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