APA (7th ed.) Citation

Trudgill, S. T., Walling, D. E., & Webb, B. (1999). Water quality: Processes and policy. Wiley.

Chicago Style (17th ed.) Citation

Trudgill, Stephen T., D. E. Walling, and Bruce Webb. Water Quality: Processes and Policy. New York: Wiley, 1999.

MLA (9th ed.) Citation

Trudgill, Stephen T., et al. Water Quality: Processes and Policy. Wiley, 1999.