APA (7th ed.) Citation

Gray, N. F. (2004). Biology of wastewater treatment / N.F. Gray (2nd ed.). Imperial College Press.

Chicago Style (17th ed.) Citation

Gray, N. F. Biology of Wastewater Treatment / N.F. Gray. 2nd ed. London: Imperial College Press, 2004.

MLA (9th ed.) Citation

Gray, N. F. Biology of Wastewater Treatment / N.F. Gray. 2nd ed. Imperial College Press, 2004.

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