APA (7th ed.) Citation

Gray, N. F. (1989). Biology of wastewater treatment. Oxford University Press.

Chicago Style (17th ed.) Citation

Gray, N. F. Biology of Wastewater Treatment. Oxford [England] ; New York: Oxford University Press, 1989.

MLA (9th ed.) Citation

Gray, N. F. Biology of Wastewater Treatment. Oxford University Press, 1989.

Warning: These citations may not always be 100% accurate.