Dyfyniad APA

Hayes, D. (1998). Effective verbal communication. London: Hodder and Stoughton.

Dyfyniad Arddull Chicago

Hayes, Denis. Effective Verbal Communication. London: Hodder and Stoughton, 1998.

Dyfyniad MLA

Hayes, Denis. Effective Verbal Communication. London: Hodder and Stoughton, 1998.

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