Knowler, F., & Watkin, J. (1960). Practical Course in Agricultural Chemistry (2.). Macmillan and Company Ltd.
Chicago Edition CitationKnowler, Frank, and J.Elphin Watkin. Practical Course in Agricultural Chemistry. 2. London: Macmillan and Company Ltd, 1960.
MLA Edition CitationKnowler, Frank, and J.Elphin Watkin. Practical Course in Agricultural Chemistry. 2. Macmillan and Company Ltd, 1960.
Advarsel: Disse citationer er muligvist ikke 100% nøjagtige.