Symposium Somiplan & Broughton, W. (1979). Soil microbiology and plant nutrition: Proceedings. Penerbit Universiti.
Čikaški stil citiranja (17. izdanje)Symposium Somiplan i W.J Broughton. Soil Microbiology and Plant Nutrition: Proceedings. Kuala Lumpur: Penerbit Universiti, 1979.
MLA način citiranja (9. izdanje)Symposium Somiplan i W.J Broughton. Soil Microbiology and Plant Nutrition: Proceedings. Penerbit Universiti, 1979.
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