For example, see Brown, Sarah. Pleading the Fifth. BBC News. 2002-02-05 [2015-03-14]. (原始内容存档于2020-11-09). McCarthy's House Un-American Activities Committee
nixonfoundation.org
尼克松生平概览. Richard Nixon Foundation. [2024-05-17](美国英语).
web.archive.org
For example, see Brown, Sarah. Pleading the Fifth. BBC News. 2002-02-05 [2015-03-14]. (原始内容存档于2020-11-09). McCarthy's House Un-American Activities Committee