Dyfyniad APA

Lai, R. (1990). Soil Erosion in the Tropics. New York: McGraw-Hill.

Dyfyniad Arddull Chicago

Lai, Rattan. Soil Erosion in the Tropics. New York: McGraw-Hill, 1990.

Dyfyniad MLA

Lai, Rattan. Soil Erosion in the Tropics. New York: McGraw-Hill, 1990.

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