APA (7th ed.) Citation

Ashley, R., Booker, N., & Smith, H. (2004). Sustainable water services: A procedural guide. IWA Pub..

Chicago Style (17th ed.) Citation

Ashley, Richard, Nic Booker, and Heidi Smith. Sustainable Water Services: A Procedural Guide. London: IWA Pub., 2004.

MLA (9th ed.) Citation

Ashley, Richard, et al. Sustainable Water Services: A Procedural Guide. IWA Pub., 2004.