ASHLEY A. (1984). HANDBOOK OF COMMERCIAL CORRESPONDENCE. OXFORD UNIVERSITY PRESS.
Chicago Style (17. basım) AtıfASHLEY A. HANDBOOK OF COMMERCIAL CORRESPONDENCE. NEW DELHI BOMBAY: OXFORD UNIVERSITY PRESS, 1984.
MLA (9th ed.) AtıfASHLEY A. HANDBOOK OF COMMERCIAL CORRESPONDENCE. OXFORD UNIVERSITY PRESS, 1984.
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