Dyfyniad APA

Courtney, F. (1976). The soil : an introduction to soil: Study. Hodder and Stoughton.

Dyfyniad Arddull Chicago

Courtney, F.M. The Soil : An Introduction to Soil: Study. London: Hodder and Stoughton, 1976.

Dyfyniad MLA

Courtney, F.M. The Soil : An Introduction to Soil: Study. Hodder and Stoughton, 1976.

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