Boyer, P. S., Clark, C. E., & Kett, J. F. (1993). The enduring vision: A history of the American people. Lexington, Massachusetts: D. C. Heath.
Trích dẫn kiểu ChicagoBoyer, Paul S., Clifford E. Clark, và Joseph F. Kett. The Enduring Vision: A History of the American People. Lexington, Massachusetts: D. C. Heath, 1993.
Deismireacht MLABoyer, Paul S., Clifford E. Clark, và Joseph F. Kett. The Enduring Vision: A History of the American People. Lexington, Massachusetts: D. C. Heath, 1993.
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