Nickell, Joe. Enfield Poltergeist. CSI. Committee for the Scientific Investigation of Claims of the Paranormal. July 2012 [2018-04-14]. (原始内容存档于2018-06-12).
Nickell, Joe. The Haunted Tape Recorder. CSI. Committee for the Scientific Investigation of Claims of the Paranormal. September 1995 [2018-04-14]. (原始内容存档于2018-12-06).
Nickell, Joe. Enfield Poltergeist. CSI. Committee for the Scientific Investigation of Claims of the Paranormal. July 2012 [2018-04-14]. (原始内容存档于2018-06-12).
Nickell, Joe. The Haunted Tape Recorder. CSI. Committee for the Scientific Investigation of Claims of the Paranormal. September 1995 [2018-04-14]. (原始内容存档于2018-12-06).