MERRIAM-WEBSTER PUB. (1996). MERRIAM-WEBSTER`S GUIDE TO BUSINESS CORRESPONDENCE (2ND.). MERRIAM-WEBSTER.
Chicago Style (17. basım) AtıfMERRIAM-WEBSTER PUB. MERRIAM-WEBSTER`S GUIDE TO BUSINESS CORRESPONDENCE. 2ND. MASSACHUSETTS: MERRIAM-WEBSTER, 1996.
MLA (9th ed.) AtıfMERRIAM-WEBSTER PUB. MERRIAM-WEBSTER`S GUIDE TO BUSINESS CORRESPONDENCE. 2ND. MERRIAM-WEBSTER, 1996.
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