What are the push and pull factors of the great migration?

How should the student cite this source using mla citation format?

His is the name of the group in the house of representatives that, in 1947, began hearings to expose communist infiltration in american life. unfortunately, a good deal of the evidence they used was based on hearsay and conjecture, meaning innocent people were harmed by their findings.

How does the power of the supreme court act as a check on the other branches of government