APA (7th ed.) Citation

Middlebrooks, E. J. (1981). Energy requirement for small wastewater treatment systems. Journal of Water Pollution Control Federation, 53, 1172.

Chicago Style (17th ed.) Citation

Middlebrooks, E. J. "Energy Requirement for Small Wastewater Treatment Systems." Journal of Water Pollution Control Federation 53 (1981): 1172.

MLA (9th ed.) Citation

Middlebrooks, E. J. "Energy Requirement for Small Wastewater Treatment Systems." Journal of Water Pollution Control Federation, vol. 53, 1981, p. 1172.