Finding a Publication Date

Here's a common problem: You find a resource online that you want to cite, but the publication date is missing.

The case in question here is this article by Joseph Renzulli: A Practical System for Identifying Gifted and Talented Students.

The article references a number of studies and articles from the 1980's. How recent is the article itself?

It's not a hard problem to solve. Normally, start on the page itself and if clues don't reveal themselves, truncate the URL to see if there's a directory with date information, or try Page Info to see when the page was last updated. Upon investigation, there doesn't immediately seem to be a listing of articles on the site and the last update for this page was in 2013. This doesn't seem that accurate since the article is mostly about older findings.

So one investigation technique is to query Google (or another database) with the title of the article.

Try it and see what date you find.