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Dyfyniad Arddull ChicagoHesketh, Kylie, David Crawford, and Jo Salmon. Children's Television Viewing and Objectively Measured Physical Activity: Associations With Family Circumstance. BioMed Central, 2006.
Dyfyniad MLAHesketh, Kylie, David Crawford, and Jo Salmon. Children's Television Viewing and Objectively Measured Physical Activity: Associations With Family Circumstance. BioMed Central, 2006.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.