Symposium Somiplan & Broughton, W. (1979). Soil microbiology and plant nutrition: Proceedings. Penerbit Universiti.
Lua i Stíl Chicago (17ú heag.)Symposium Somiplan agus W.J Broughton. Soil Microbiology and Plant Nutrition: Proceedings. Kuala Lumpur: Penerbit Universiti, 1979.
Lua MLA (9ú heag.)Symposium Somiplan agus W.J Broughton. Soil Microbiology and Plant Nutrition: Proceedings. Penerbit Universiti, 1979.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.