Courtney, F. (1976). The soil : an introduction to soil: Study. Hodder and Stoughton.
Chicago-čujuhus (17. p.)Courtney, F.M. The Soil : An Introduction to Soil: Study. London: Hodder and Stoughton, 1976.
MLA-čujuhus (9. p.)Courtney, F.M. The Soil : An Introduction to Soil: Study. Hodder and Stoughton, 1976.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.