1. First amendmentCornell Law Legal Information Institute2021-03-01https://www.law.cornell.edu/constitution/first_amendment
2. State action requirementCornell Law Legal Information Institute2021-03-01https://www.law.cornell.edu/wex/state_action_requirement#:~:text=Definition,rather%20than%20a%20private%20actor
3. The U.S. Constitution A to Z
4. WermielSActual maliceThe First Amendment Encyclopedia2021-03-01https://www.mtsu.edu/first-amendment/article/889/actual-malice