What are four ways to incorporate evidence into a research paper?

The four ways to incorporate evidence into the research paper are:

1.    If the research you are investigating has been with other research paper before.

2.    There is an experimental proof that the evidence is true.

3.    The research published belongs to a reliable source.

4.    There are citations of the evidence that you are investigating

can you show me the drop down menu? ill answer it after you've done that. ill edit this i mean promise

explanation:

this answer was editing it cause i couldn't delete!