Answer:
A university study or Educational field source is most likely to be impartial.
Explanation:
Hope it helped you!!
Government data and data collected by individual companies can be partial. So, you may want to use some encyclopaedia like Britannica or Wikipedia. I personally prefer Britannica, as Wikipedia sometimes reflect personal views because anyone can edit it. You can visit some research by universities. I will advise to refer to more than one sources, so you can decide for yourself what to include and what not to include.
