Darwin, C. R., & Howard, A. S. (1966). Darwin on humus and the eartworm: The formation of vegetable mould through the action of worms with observations on their habits. London: Faber and Faber.
Chicago Style CitationDarwin, Charles Robert, and Albert Sir Howard. Darwin On Humus and the Eartworm: The Formation of Vegetable Mould Through the Action of Worms With Observations On Their Habits. London: Faber and Faber, 1966.
MLA CitationDarwin, Charles Robert, and Albert Sir Howard. Darwin On Humus and the Eartworm: The Formation of Vegetable Mould Through the Action of Worms With Observations On Their Habits. London: Faber and Faber, 1966.
Warning: These citations may not always be 100% accurate.