Darwin, C., Barrett, P. H., & Freeman, R. B. (1989). The formation of vegetable mould through the action of worms with observations on their habits. Pickering.
Chicago-Zitierstil (17. Ausg.)Darwin, Charles, Paul H. Barrett, und R. B. Freeman. The Formation of Vegetable Mould Through the Action of Worms with Observations on Their Habits. London: Pickering, 1989.
MLA-Zitierstil (8. Ausg.)Darwin, Charles, et al. The Formation of Vegetable Mould Through the Action of Worms with Observations on Their Habits. Pickering, 1989.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.