APA (7th ed.) Citation

Walker, C. H., Hopkin, S. P., & Sibly, R. M. (2001). Principles of ecotoxicology (2nd ed.). Taylor & Francis.

Chicago Style (17th ed.) Citation

Walker, C. H., S. P. Hopkin, and R. M. Sibly. Principles of Ecotoxicology. 2nd ed. London: Taylor & Francis, 2001.

MLA (9th ed.) Citation

Walker, C. H., et al. Principles of Ecotoxicology. 2nd ed. Taylor & Francis, 2001.