Dyfyniad APA

Poe, R. W. (1994). The McGraw-Hill handbook of business letters. New York: McGraw-Hill.

Dyfyniad Arddull Chicago

Poe, Roy W. The McGraw-Hill Handbook of Business Letters. New York: McGraw-Hill, 1994.

Dyfyniad MLA

Poe, Roy W. The McGraw-Hill Handbook of Business Letters. New York: McGraw-Hill, 1994.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.