"Great Waters". Superior Watershed Partnership. Dicapai pada 12 Ogos 2008.
wikipedia.org
en.wikipedia.org
Ghassemi, Fereidoun (2007). Inter-basin water transfer. Cambridge: Cambridge University
Press. m/s. 264. ISBN 0-521-86969-2. Cite has empty unknown parameter: |1= (bantuan); line feed character in |publisher= at position 21 (bantuan)