Need Citation for Deming Quote on Thinking!

[thepilles@compuserve.com]

Moderator Note:  If anyone can assist Rebecca, please copy her on your response.

Greetings DEN,
  I'm a master's candidate in management at Johns
Hopkins University. I want to include a quote from
Deming in my master's thesis but don't have a
citation:
  "The greatest leverage for improvement lies not 
changing the way we work, but in how we think."

   My final project is on systems thinking.

Thanks in advance,
Rebecca Pille
thepilles@compuserve.com
Message posting through the Clemson CQI Web Server.
================================================================