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Dyfyniad Arddull ChicagoParke, Ross D. Future Families: Diverse Forms, Rich Possibilities. Chichester, West Sussex: John Wiley & Sons Inc., 2013.
Dyfyniad MLAParke, Ross D. Future Families: Diverse Forms, Rich Possibilities. John Wiley & Sons Inc., 2013.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.