Regarding citing things found here: Our rules DO permit people to ask for help with their homework, so long as they are seeking clarification or resources, rather than the answer itself. Also: Sometimes flairs can be reluctant to answer a question that looks like homework, because they don't want to be involved in plagiarism (and sadly, yes, there are those who plagiarize reddit comments).

I would say that this is a fine place to ask for historical sources, and we do maintain a books and resources list on the sidebar.

Additionally, we would highly suggest that you check out our six part series on 'Finding and Understanding Sources', which might prove to be useful in your research.