Cita APA (7a ed.)
Koch, P. (2010). Water sources (4th ed.). American Water Works Association.
Cita Chicago Style (17a ed.)
Koch, Paul. Water Sources. 4th ed. Denver, Colo.: American Water Works Association, 2010.
Cita MLA (9a ed.)
Koch, Paul. Water Sources. 4th ed. American Water Works Association, 2010.
Precaución: Estas citas no son 100% exactas.