Spring, J. H. (2001). The American school, 1642-2000 (5th ed.). Boston: McGraw-Hill.
Trích dẫn kiểu ChicagoSpring, Joel H. The American School, 1642-2000. 5th ed. Boston: McGraw-Hill, 2001.
Deismireacht MLASpring, Joel H. The American School, 1642-2000. 5th ed. Boston: McGraw-Hill, 2001.
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