You could see the bibliography of the book itself. You could google a bit and see the guy is a leader in this field, and a pioneer of this research. Answering a request for sources of your assertion with a request for theirs isn't done in good faith.
I made no such assertion? I was following the thread and I think its a fair request. It was an easy google search to see that he was fired for bullying and creating a hostile workplace a few years back...not sure where that landed. And I saw a number of articles relating to pseudoscience that he recommends in the book. It was a simple ask for their simple ask.