Chicago
U.S. Congress. Senate. PROTOCOL AMENDING TAX CONVENTION WITH FINLAND. 109th Cong., 2nd sess., 2006. 109-18. https://www.govinfo.gov/app/details/CDOC-109tdoc18.
APA
Senate, Congress. (2006, September 29). Treaty Doc. 109-18 - PROTOCOL AMENDING TAX CONVENTION WITH FINLAND. [Government]. U.S. Government Publishing Office. https://www.govinfo.gov/app/details/CDOC-109tdoc18
MLA
Senate, Congress. Treaty Doc. 109-18 - PROTOCOL AMENDING TAX CONVENTION WITH FINLAND. U.S. Government Publishing Office, (29 Sep 2006), https://www.govinfo.gov/app/details/CDOC-109tdoc18
Bluebook
Senate, Congress, PROTOCOL AMENDING TAX CONVENTION WITH FINLAND, GovInfo, (September 29, 2006), https://www.govinfo.gov/app/details/CDOC-109tdoc18