Q. In running text, what is the proper way to write out a URL—with the www or without?

Q. I am copyediting a nonfiction manuscript that contains citations of online news articles. We are hoping to use footnotes rather than endnotes for this book, and the URLs are very long and ungainly. The author’s proposed solution is to include only the web address for the news site’s home page and not the full article URL. I think it would be better to use a service to shorten these so that we can list a (currently) working URL for each specific article without taking up two or three lines of space for each one. Do you have any opinions on whether this is a sound practice or have any other suggestions for this kind of problem?