(1977). Progress in human geography. Sage.
Dyfyniad Arddull ChicagoProgress in Human Geography. [London]: Sage, 1977.
Dyfyniad MLAProgress in Human Geography. Sage, 1977.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.
(1977). Progress in human geography. Sage.
Dyfyniad Arddull ChicagoProgress in Human Geography. [London]: Sage, 1977.
Dyfyniad MLAProgress in Human Geography. Sage, 1977.