Harvard referencing app

[Idefix]

I am looking for recommendations for an app that will help with Harvard referencing (have downloaded Mendeley but not sure if it is what I need).
I have a problem with my working memory and also a visual processing disorder that is making referencing my first essay incredidbly hard (15 hours spent on the reference list so far and no where near finished) and really stressing me . Have asked for an extension, when doing my diploma 5yrs ago I was given 25% extra time allowance.
Sorry for all the waffling.

RefME might work for you.
www.refme.com/uk/referencing-generator/harvard/

Seconding RefMe, its great. If you use Chrome as your web brower you can add a web clipper to it as well.

Google Scholar has a citation tool