United States. Internal Revenue Service. Charitable contributions, substantiation and disclosure requirements. Dept. of the Treasury, Internal Revenue Service.
Chicago Style (17th ed.) CitationUnited States. Internal Revenue Service. Charitable Contributions, Substantiation and Disclosure Requirements. [Washington, D.C.?]: Dept. of the Treasury, Internal Revenue Service.
MLA (9th ed.) CitationUnited States. Internal Revenue Service. Charitable Contributions, Substantiation and Disclosure Requirements. Dept. of the Treasury, Internal Revenue Service.
Warning: These citations may not always be 100% accurate.