Ritchie, D. A. (1997). American history: The modern era since 1865. New York: Glencoe/McGraw-Hill.
Trích dẫn kiểu ChicagoRitchie, Donald A. American History: The Modern Era Since 1865. New York: Glencoe/McGraw-Hill, 1997.
Deismireacht MLARitchie, Donald A. American History: The Modern Era Since 1865. New York: Glencoe/McGraw-Hill, 1997.
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