Morgan, R. P. C. (1998). Soil erosion and conservation. (2nd ed.). Longman.
Chicago-čujuhus (17. p.)Morgan, R.P.C(Royston Philip Charles). Soil Erosion and Conservation. 2nd ed. Essex: Longman, 1998.
MLA-čujuhus (9. p.)Morgan, R.P.C(Royston Philip Charles). Soil Erosion and Conservation. 2nd ed. Longman, 1998.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.