(2001). Human development report 2001. UNDP.
Dyfyniad Arddull ChicagoHuman Development Report 2001. New York: UNDP, 2001.
Dyfyniad MLAHuman Development Report 2001. UNDP, 2001.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.
(2001). Human development report 2001. UNDP.
Dyfyniad Arddull ChicagoHuman Development Report 2001. New York: UNDP, 2001.
Dyfyniad MLAHuman Development Report 2001. UNDP, 2001.