Citazione Stile APA (7a Edizione)

Koch, P. (2010). Water sources (4th ed.). American Water Works Association.

Citazione stile Chigago Style (17a edizione)

Koch, Paul. Water Sources. 4th ed. Denver, Colo.: American Water Works Association, 2010.

Citatione MLA (9a ed.)

Koch, Paul. Water Sources. 4th ed. American Water Works Association, 2010.