Cita APA (7th ed.)
Ritter, J. A. (2010). Water quality (4th ed.). American Water Works Association.
Cita Chicago (17th ed.)
Ritter, Joseph A. Water Quality. 4th ed. Denver, Colo.: American Water Works Association, 2010.
Cita MLA (9th ed.)
Ritter, Joseph A. Water Quality. 4th ed. American Water Works Association, 2010.
Atenció: Aquestes cites poden no estar 100% correctes.