Παραπομπή σε μορφή APA (7η εκδ.)

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.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Darwin, Charles, Paul H. Barrett, και R. B. Freeman. The Formation of Vegetable Mould Through the Action of Worms with Observations on Their Habits. London: Pickering, 1989.

Παραπομπή σε μορφή MLA (8th εκδ.)

Darwin, Charles, et al. The Formation of Vegetable Mould Through the Action of Worms with Observations on Their Habits. Pickering, 1989.