The Smoking Gun Tape. Watergate.info website. 1972-06-23 [2013-03-28]. （原始内容(Transcript of the recording of a meeting between President Nixon and H. R. Haldeman)存档于2012-05-01）.
Dickinson, William B.; Mercer Cross, Barry Polsky. Watergate: chronology of a crisis1. D. C.: Congressional Quarterly Inc. 1973: 8 133 140 180 188 [2013-03-28]. ISBN 0-87187-059-2. OCLC 20974031. （原始内容存档于2009-09-24）.引文使用过时参数coauthors (帮助)本书共有两卷，共用同一个ISBN编码和国会图书馆编码E859 .C62 1973
The Smoking Gun Tape. Watergate.info website. 1972-06-23 [2013-03-28]. （原始内容(Transcript of the recording of a meeting between President Nixon and H. R. Haldeman)存档于2012-05-01）.
证据其实很简单：根据1972年6月23日的录音，总统指示中央情报局（Central Intelligence Agency，简称CIA）局长说：“……中央情报局应当给联邦调查局打个电话，就白宫方面希望，为了国家利益，不要进一步深入调查水门案了”。这一录音成为了总统妨碍司法的“确凿证据”（smoking gun）White, Theodore Harold. Breach of Faith: The Fall of Richard Nixon. New York: Atheneum Publishers. 1975: 7 [2020-09-12]. ISBN 0-689-10658-0. （原始内容存档于2009-04-27）.
"Soon Alexander Haig and James St. Clair learned of the existence of this tape and they were convinced that it would guarantee Nixon's impeachment in the House of Representatives and conviction in the Senate."Dash, Samuel. Chief Counsel: Inside the Ervin Committee – The Untold Story of Watergate. New York: Random House. 1976: 259–260 [2013-03-28]. ISBN 0-394-40853-5. （原始内容存档于2008-10-10）.
"There were still simply too many unanswered questions in the case. By that time, thinking about the break-in and reading about it, I'd have had to be some kind of moron to believe that no other people were involved. No political campaign committee would turn over so much money to a man like Gordon Liddy without someone higher up in the organization approving the transaction. How could I not see that? These questions about the case were on my mind during a pretrial session in my courtroom December 4."Sirica, John J. To set the record straight: the break-in, the tapes, the conspirators, the pardon. New York: Norton. 1979: 56 [2014-11-02]. ISBN 0-393-01234-4. （原始内容存档于2008-10-10）.
Dickinson, William B.; Mercer Cross, Barry Polsky. Watergate: chronology of a crisis1. D. C.: Congressional Quarterly Inc. 1973: 8 133 140 180 188 [2013-03-28]. ISBN 0-87187-059-2. OCLC 20974031. （原始内容存档于2009-09-24）.引文使用过时参数coauthors (帮助)本书共有两卷，共用同一个ISBN编码和国会图书馆编码E859 .C62 1973
证据其实很简单：根据1972年6月23日的录音，总统指示中央情报局（Central Intelligence Agency，简称CIA）局长说：“……中央情报局应当给联邦调查局打个电话，就白宫方面希望，为了国家利益，不要进一步深入调查水门案了”。这一录音成为了总统妨碍司法的“确凿证据”（smoking gun）White, Theodore Harold. Breach of Faith: The Fall of Richard Nixon. New York: Atheneum Publishers. 1975: 7 [2020-09-12]. ISBN 0-689-10658-0. （原始内容存档于2009-04-27）.
"Soon Alexander Haig and James St. Clair learned of the existence of this tape and they were convinced that it would guarantee Nixon's impeachment in the House of Representatives and conviction in the Senate."Dash, Samuel. Chief Counsel: Inside the Ervin Committee – The Untold Story of Watergate. New York: Random House. 1976: 259–260 [2013-03-28]. ISBN 0-394-40853-5. （原始内容存档于2008-10-10）.
"There were still simply too many unanswered questions in the case. By that time, thinking about the break-in and reading about it, I'd have had to be some kind of moron to believe that no other people were involved. No political campaign committee would turn over so much money to a man like Gordon Liddy without someone higher up in the organization approving the transaction. How could I not see that? These questions about the case were on my mind during a pretrial session in my courtroom December 4."Sirica, John J. To set the record straight: the break-in, the tapes, the conspirators, the pardon. New York: Norton. 1979: 56 [2014-11-02]. ISBN 0-393-01234-4. （原始内容存档于2008-10-10）.
[1]Theodore White, Breach of Faith: The Fall of Richard Nixon （页面存档备份，存于互联网档案馆）, Readers Digest Press, Athineum Publishers, 1975, pp. 296–298
