Sabin, W. A. (1999). The Gregg reference manual. Glencoe/MrGraw-Hill.
Trích dẫn kiểu ChicagoSabin, William A. The Gregg Reference Manual. Glencoe/MrGraw-Hill, 1999.
MLA CitationSabin, William A. The Gregg Reference Manual. Glencoe/MrGraw-Hill, 1999.
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