Gregory, H. (2002). Public speaking for college and career (Sixth edition.). McGraw-Hill.
Dyfyniad Arddull ChicagoGregory, Hamilton. Public Speaking for College and Career. Sixth edition. Boston: McGraw-Hill, 2002.
Dyfyniad MLAGregory, Hamilton. Public Speaking for College and Career. Sixth edition. McGraw-Hill, 2002.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.