1
Management Quarterly, (1994)
2
Public Water Supply, (2009)
3
Water and Liquid Waste Treatment Plant and System Operators, (2006)
4
E Mainstream, (2008)
5
Rural Water, (2007)
6
Runge, Jon, State of the industry report 2008 charting the course ahead, Journal / American Water Works Association, 100, 10, pp. 10-74, (2008)
7
Technology Source, (2003)
8
T H E Journal, (1998)
9
Cornford, Ian R., Ensuring effective learning from modular courses: A cognitive psychology-skill learning perspective, Journal of Vocational Education and Training, 49, 2, pp. 237-251, (1997)
10
Our Turn Interactive Modular Instruction in Mathematics, (2001)
