APA (7th ed.) Citation

Friedrichs, C. C. (1936). Purification methods at New Orleans. Journal: American Water Works Association, 28, 537.

Chicago Style (17th ed.) Citation

Friedrichs, C. C. "Purification Methods at New Orleans." Journal: American Water Works Association 28 (1936): 537.

MLA (9th ed.) Citation

Friedrichs, C. C. "Purification Methods at New Orleans." Journal: American Water Works Association, vol. 28, 1936, p. 537.