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Dyfyniad Arddull ChicagoSchaefer, Richard T. Sociology: A Brief Introduction. 9th ed. New Delhi: Tata McGraw Hill, 2012.
Dyfyniad MLASchaefer, Richard T. Sociology: A Brief Introduction. 9th ed. Tata McGraw Hill, 2012.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.