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Dyfyniad Arddull ChicagoO'Hair, Dan. A Pocket Guide to Public Speaking. Boston: Bedford/St. Martin's, 2019.
Dyfyniad MLAO'Hair, Dan. A Pocket Guide to Public Speaking. Boston: Bedford/St. Martin's, 2019.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.