Brewster, J. L. (1971). Some factors affecting the uptake of plant nutrients from the soil. University of Oxford.
Lua i Stíl Chicago (17ú heag.)Brewster, J. L. Some Factors Affecting the Uptake of Plant Nutrients from the Soil. England: University of Oxford, 1971.
Lua MLA (8ú heag.)Brewster, J. L. Some Factors Affecting the Uptake of Plant Nutrients from the Soil. University of Oxford, 1971.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.