Library of Congress. Congressional Research Service & ProQuest (Firm). (2009). 527 Groups and Campaign Activity: Analysis Under Campaign Finance and Tax Laws. [publisher not identified].
Chicago Style (17th ed.) CitationLibrary of Congress. Congressional Research Service and ProQuest (Firm). 527 Groups and Campaign Activity: Analysis Under Campaign Finance and Tax Laws. [Place of publication not identified]: [publisher not identified], 2009.
MLA (9th ed.) CitationLibrary of Congress. Congressional Research Service and ProQuest (Firm). 527 Groups and Campaign Activity: Analysis Under Campaign Finance and Tax Laws. [publisher not identified], 2009.
Warning: These citations may not always be 100% accurate.