Wikipedia: A Disinformation Operation? – Swiss Policy Research
National Coalition Against Censorship
The First Amendment Encyclopedia
First Amendment and Censorship (ALA)
History Of Censorship In America – stacker.com
Censorpedia: Interactive Database – Censorship Incidents
21st-century censorship – Colombia Journalism Review
Censorship in the United States – Infoplease
10 Appalling Examples of Censorship in the United States History Collection – Spike Media
Censorship in the United States – ThoughtCo.
How Media Censorship Affects the News You See – ThoughtCo.
Censorship in America – Real Clear Politics
10 Shocking Examples Of Censorship Groups or Laws – Listverse