(2000). Valuing rural amenities. OECD.
Dyfyniad Arddull ChicagoValuing Rural Amenities. Paris, Cedex, France: OECD, 2000.
Dyfyniad MLAValuing Rural Amenities. OECD, 2000.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.
(2000). Valuing rural amenities. OECD.
Dyfyniad Arddull ChicagoValuing Rural Amenities. Paris, Cedex, France: OECD, 2000.
Dyfyniad MLAValuing Rural Amenities. OECD, 2000.