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Dyfyniad Arddull ChicagoWeston , Paul B. Criminal Investigation. 9th ed. New Jersey: Prentice Hall, 2003.
Dyfyniad MLAWeston , Paul B. Criminal Investigation. 9th ed. Prentice Hall, 2003.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.