APA (7th ed.) Citation

Great Britain. National Agricultural Advisory Service. (1971). Trace elements in soil and crops: Proceedings of a conference. H.M.S.O..

Chicago Style (17th ed.) Citation

Great Britain. National Agricultural Advisory Service. Trace Elements in Soil and Crops: Proceedings of a Conference. London: H.M.S.O., 1971.

MLA (9th ed.) Citation

Great Britain. National Agricultural Advisory Service. Trace Elements in Soil and Crops: Proceedings of a Conference. H.M.S.O., 1971.