FITZPATRICK, E. (1983). Soil: Their formation, classification and distribution. Longman.
Lua i Stíl Chicago (17ú heag.)FITZPATRICK, E.A. Soil: Their Formation, Classification and Distribution. London: Longman, 1983.
Lua MLA (9ú heag.)FITZPATRICK, E.A. Soil: Their Formation, Classification and Distribution. Longman, 1983.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.