There are certain sources that you cannot use for a persuasive essay because they are not reliable sources that can be easily traced and are not guaranteed to have correct facts. These sources include: Magazines, 10+ year old articles, websites like Wiki pedia, You Tube, etc., The most creditable sources are fairly recent books or articles (if online the best sites end in .org or .gov but a lot of .com ones are fine as well) that have listed sources and evidence.
I hope this helps! :)
