(原始内容存档于2011-06-09). House Judiciary Subcommittee on Commercial and Administrative Law Subpoena -2008-06-26 (PDF). 2008-06-26 [2008-06-26]. (原始内容 (PDF)存档于2008-07-11)
Kevin; Mangan, Dan. Sen. Lindsey Graham will challenge Georgia grand jury subpoena in Trump election interference probe. CNBC. 2022-07-06 [2022-07-16]. (原始内容存档于2022-07-16)