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Dyfyniad Arddull ChicagoWorld Health Organization. National Cancer Control Programmes: Policies and Managerial Guidelines. Geneva: WHO, 1995.
Dyfyniad MLAWorld Health Organization. National Cancer Control Programmes: Policies and Managerial Guidelines. WHO, 1995.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.