Dyfyniad APA

BRIGGS, D. (1981). Sources and methods in geogaphy: Soils. Butterworths.

Dyfyniad Arddull Chicago

BRIGGS, David. Sources and Methods in Geogaphy: Soils. London: Butterworths, 1981.

Dyfyniad MLA

BRIGGS, David. Sources and Methods in Geogaphy: Soils. Butterworths, 1981.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.