Ashley, A. (1992). A handbook of commercial correspondence (2nd ed.). Oxford: Oxford University Press.
Dyfyniad Arddull ChicagoAshley, A. A Handbook of Commercial Correspondence. 2nd ed. Oxford: Oxford University Press, 1992.
Dyfyniad MLAAshley, A. A Handbook of Commercial Correspondence. 2nd ed. Oxford: Oxford University Press, 1992.
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