APA Citation

Hopkins, D. P. Chemicals humus, and the soil. London: Faber and Faber Limited.

Chicago Style Citation

Hopkins, Donald P. Chemicals Humus, and the Soil. London: Faber and Faber Limited.

MLA Citation

Hopkins, Donald P. Chemicals Humus, and the Soil. London: Faber and Faber Limited.

Warning: These citations may not always be 100% accurate.