Chicago
U.S. Congress. Senate. PROTOCOL AMENDING TAX CONVENTION WITH DENMARK. 109th Cong., 2nd sess., 2006. 109-19. https://www.govinfo.gov/app/details/CDOC-109tdoc19.
APA
Senate, Congress. (2006, September 29). Treaty Doc. 109-19 - PROTOCOL AMENDING TAX CONVENTION WITH DENMARK. [Government]. U.S. Government Publishing Office. https://www.govinfo.gov/app/details/CDOC-109tdoc19
MLA
Senate, Congress. Treaty Doc. 109-19 - PROTOCOL AMENDING TAX CONVENTION WITH DENMARK. U.S. Government Publishing Office, (29 Sep 2006), https://www.govinfo.gov/app/details/CDOC-109tdoc19
Bluebook
Senate, Congress, PROTOCOL AMENDING TAX CONVENTION WITH DENMARK, GovInfo, (September 29, 2006), https://www.govinfo.gov/app/details/CDOC-109tdoc19