O'Hara. Inventing the Pinkertons; or, Spies, Sleuths, Mercenaries, and Thugs. Johns Hopkins University Press.
芝加哥风格引文O'Hara. Inventing the Pinkertons; or, Spies, Sleuths, Mercenaries, and Thugs. Johns Hopkins University Press.
MLA引文O'Hara. Inventing the Pinkertons; or, Spies, Sleuths, Mercenaries, and Thugs. Johns Hopkins University Press.
警告：这些引文格式不一定是100％准确.