Penn, B. (2004). Be your own PR expert (2nd ed.). Thomson Learning.
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Dyfyniad Arddull Chicago
Penn, Bill. Be Your Own PR Expert. 2nd ed. Australia: Thomson Learning, 2004.
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Dyfyniad MLA
Penn, Bill. Be Your Own PR Expert. 2nd ed. Thomson Learning, 2004.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.