Urmila Rai & Rai, S. (2001). Business communication (2nd rev. ed.). Himalaya Publishing House.
Dyfyniad Arddull ChicagoUrmila Rai and S.M Rai. Business Communication. 2nd rev. ed. Mumbai: Himalaya Publishing House, 2001.
Dyfyniad MLAUrmila Rai and S.M Rai. Business Communication. 2nd rev. ed. Himalaya Publishing House, 2001.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.