Ritchie, D. A. (1997). American history: The early years to 1877. New York: Glencoe/McGraw-Hill.
Trích dẫn kiểu ChicagoRitchie, Donald A. American History: The Early Years to 1877. New York: Glencoe/McGraw-Hill, 1997.
MLA citiranjeRitchie, Donald A. American History: The Early Years to 1877. New York: Glencoe/McGraw-Hill, 1997.
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