Search for Quotes on Full Auto Effectiveness vs Semi-auto

I have been searching for quotes on how ineffective full auto fire is in the hands of untrained people. Grok4.1 gives these, but the links do not work or do not show the actual quotes. They may be correct but only in books or videos. If anyone can find an actual link which shows any of the following quotes, I would appreciate it. 1. Lt. Col. Dave Grossman (U.S. Army Ranger, author of On Combat and On Killing) “Full automatic fire is almost useless in the hands of anyone who is not well trained. The tendency is to spray and...