Ottinger. Refining Expertise. NYU Press.
Dyfyniad Arddull ChicagoOttinger. Refining Expertise. NYU Press.
Dyfyniad MLAOttinger. Refining Expertise. NYU Press.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.
Ottinger. Refining Expertise. NYU Press.
Dyfyniad Arddull ChicagoOttinger. Refining Expertise. NYU Press.
Dyfyniad MLAOttinger. Refining Expertise. NYU Press.