| 1 | Water Quality; Diffuse Pollution and Watershed Management, Second Edition, Vladimir Novotny, John Wiley & Sons, Inc., 2003, New Jersey. |
| 2 | Diffuse Pollution; An Introduction to the Problems and Solutions, Neil Campbell, Brian D’Arcy, Alan Frost, Vladimir Novotny & Anne Sansom, IWA Publishing, 2004, UK. |
| 3 | Agricultural Nonpoint Source Pollution Watershed Management and Hydrology Edited By William F. Ritter, Adel Shirmohammadi, ISBN 9781566702225 Published December 15, 2000 by CRC Press, 352 Pages |