Hello Ms. Leederman, We are so glad that you have found our resources helpful! Our chapters are updated from time to time, so exact publication dates are hard to pin down. I recommend using your retrieval date as the publication date. You could also go directly to the sources we cite, read and cite them instead. Good luck with your assignment, -Mr. Ari Fodeman
You can also look in the "Revisions" tab -- the latest date that an entry in the toolbox was revised is often listed there. Good luck,
Gabe Kuperminc
