APA (7th ed.) Citation

Warming, E., Balfour, I. B., Groom, P., & Vahl, M. (1909). Oecology of plants: An introduction to the study of plant-communities. Clarendon Press.

Chicago Style (17th ed.) Citation

Warming, Eugenius, Isaac Bayley Balfour, Percy Groom, and M. Vahl. Oecology of Plants: An Introduction to the Study of Plant-communities. Oxford: Clarendon Press, 1909.

MLA (9th ed.) Citation

Warming, Eugenius, et al. Oecology of Plants: An Introduction to the Study of Plant-communities. Clarendon Press, 1909.