(1999). Writing business letters.
Dyfyniad Arddull ChicagoWriting Business Letters. 1999.
Dyfyniad MLAWriting Business Letters. 1999.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.
Dyfyniad APA
(1999). Writing business letters.
Dyfyniad Arddull ChicagoWriting Business Letters. 1999.
Dyfyniad MLAWriting Business Letters. 1999.