Davis, k. Human Society.
Dyfyniad Arddull ChicagoDavis, kingsley. Human Society.
Dyfyniad MLADavis, kingsley. Human Society.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.
Davis, k. Human Society.
Dyfyniad Arddull ChicagoDavis, kingsley. Human Society.
Dyfyniad MLADavis, kingsley. Human Society.