Morgan, R. P. C. (2005). Soil Erosion (3rd ed.). Blackwell.
Lua i Stíl Chicago (17ú heag.)Morgan, R. P. C. Soil Erosion. 3rd ed. Malden, MA: Blackwell, 2005.
Lua MLA (9ú heag.)Morgan, R. P. C. Soil Erosion. 3rd ed. Blackwell, 2005.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.