Research sources for writing assignments?

[ss20ts]

Overall, I am wondering how your educational institutions allow using such sources when having a paper assignment, how about plagiarism checker?

When writing a paper in college, you usually need to have citations and a reference page. Your course instructions include which writing style to be followed - APA, MLA, Chicago, etc. Some schools offer digital libraries. All sources are supposed to be cited in papers. If one is writing correctly, then they're not plagiarizing.

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my sources              
google                  

that is all you need

This rarely works when you need access to journals. 

https://en.wikipedia.org/wiki/Google_Scholar

Google Scholar is a freely accessible web search engine that indexes the full text or metadata of scholarly literature across an array of publishing formats and disciplines.
...Google Scholar index includes peer-reviewed online academic journals and books, conference papers, theses and dissertations, preprints, abstracts, technical reports, and other scholarly literature, including court opinions and patents.

https://scholar.google.com/intl/en/scholar/about.html

it works just fine to provide you the links -- but you may have to pay or subscribe to a journal to get the full article

I'm on my 3rd online degree and I can tell you that Google Scholar is NOT going to work for most college papers. Have you looked to see how much journal articles cost? Or a subscription to journals? This advice would get VERY EXPENSIVE very quickly. Google Scholar is not comparable to EBSCO. Anyone taking an online course should find out about their school's digital library or use a local library which will have access to many of the same databases.