Gordon, R. B. (2019). American Iron, 1607-1900. Johns Hopkins University Press.
芝加哥风格引文Gordon, Robert B. American Iron, 1607-1900. Baltimore, Md.: Johns Hopkins University Press, 2019.
MLA引文Gordon, Robert B. American Iron, 1607-1900. Johns Hopkins University Press, 2019.
警告：这些引文格式不一定是100％准确.