APA Citation

Darwin, C., & Howard, S. A. .. The formation of vegetable mould. London: Faber and Faber Limited.

Chicago Style Citation

Darwin, Charles, and Sır Albert Howard. The Formation of Vegetable Mould. London: Faber and Faber Limited.

MLA Citation

Darwin, Charles, and Sır Albert Howard. The Formation of Vegetable Mould. London: Faber and Faber Limited.

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