BOHN, H. L., McNEAL, B. L., & O'CONNOR, G. A. (1979). Soil chemistry. John Wiley and Sons.
Lua i Stíl Chicago (17ú heag.)BOHN, Hinrich L., Brian L. McNEAL, agus George A. O'CONNOR. Soil Chemistry. New York: John Wiley and Sons, 1979.
Lua MLA (9ú heag.)BOHN, Hinrich L., et al. Soil Chemistry. John Wiley and Sons, 1979.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.