Dyfyniad APA

Brieger, N., & Comfort, J. (1994). Advanced business contacts. New York: Phoenix ELT.

Dyfyniad Arddull Chicago

Brieger, Nick., và Jeremy Comfort. Advanced Business Contacts. New York: Phoenix ELT, 1994.

Dyfyniad MLA

Brieger, Nick., và Jeremy Comfort. Advanced Business Contacts. New York: Phoenix ELT, 1994.

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