RUSSELL, E. (1961). Soil conditions and plant growth.: E. Walter RUSSELL. E.L.B.S. and Longman.
Lua i Stíl Chicago (17ú heag.)RUSSELL, E. Soil Conditions and Plant Growth.: E. Walter RUSSELL. London: E.L.B.S. and Longman, 1961.
Lua MLA (9ú heag.)RUSSELL, E. Soil Conditions and Plant Growth.: E. Walter RUSSELL. E.L.B.S. and Longman, 1961.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.