United States of American. (2002). Open Court Reading - Challenge Workbook - Grade 6. NewYork: Mc Graw-Hill.
Trích dẫn kiểu ChicagoUnited States of American. Open Court Reading - Challenge Workbook - Grade 6. NewYork: Mc Graw-Hill, 2002.
MLA CitationUnited States of American. Open Court Reading - Challenge Workbook - Grade 6. NewYork: Mc Graw-Hill, 2002.
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