Παραπομπή APA

Beard, C. A., & Beard, M. R. (1944). A basic history of the United State. Philadelphia: The New Home Library.

Παραπομπή Chicago Style

Beard, Charles A., and Mary R. Beard. A Basic History of the United State. Philadelphia: The New Home Library, 1944.

Παραπομπή MLA

Beard, Charles A., and Mary R. Beard. A Basic History of the United State. Philadelphia: The New Home Library, 1944.

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