Knowles, F., & Watkin, J. E. (1937). A practical course in agricultural chemistry: For senior students of agriculture, dairying, horticulture and poultry husbandry. Macmillan.
Chicago Style (17th ed.) CitationKnowles, Frank, and Job Elphin Watkin. A Practical Course in Agricultural Chemistry: For Senior Students of Agriculture, Dairying, Horticulture and Poultry Husbandry. London: Macmillan, 1937.
MLA (9th ed.) CitationKnowles, Frank, and Job Elphin Watkin. A Practical Course in Agricultural Chemistry: For Senior Students of Agriculture, Dairying, Horticulture and Poultry Husbandry. Macmillan, 1937.
Warning: These citations may not always be 100% accurate.