Where can I find Leader to Leader spring 2003, Vol. 2003, Issue 28, p39-45?

This article is a little tricky to find because you were not given the entire citation; you're missing the actual title. 

The title of the article is: Rethinking Integrity

In the large search box on the Library's welcome page type exactly: "rethinking integrity" sherman

Be sure to include the quotation marks around "rethinking integrity".  They tell the search engine to look for those words together as a phrase.

Then, click on Search

The article you are looking for should be the first item in the results list.