(1997). Human Development Report 1997. OUP.
Dyfyniad Arddull ChicagoHuman Development Report 1997. Oxford: OUP, 1997.
Dyfyniad MLAHuman Development Report 1997. OUP, 1997.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.
(1997). Human Development Report 1997. OUP.
Dyfyniad Arddull ChicagoHuman Development Report 1997. Oxford: OUP, 1997.
Dyfyniad MLAHuman Development Report 1997. OUP, 1997.