Hopkins, D. P. (1945). Chemicals, humus, and the soil: A simple presentation of contemporry knowledge and opinions about fertilizers, manures, and soil fertility. Faber and Faber.
Chicago Style (17th ed.) CitationHopkins, Donald Percy. Chemicals, Humus, and the Soil: A Simple Presentation of Contemporry Knowledge and Opinions About Fertilizers, Manures, and Soil Fertility. London: Faber and Faber, 1945.
MLA (8th ed.) CitationHopkins, Donald Percy. Chemicals, Humus, and the Soil: A Simple Presentation of Contemporry Knowledge and Opinions About Fertilizers, Manures, and Soil Fertility. Faber and Faber, 1945.
Warning: These citations may not always be 100% accurate.