APA (7th ed.) Citation

Obama, B. (2015). Veto--S. 1 (PM 6): Message from The President of the United States returning without my approval S. 1, The Keystone XL Pipeline Approval Act. U.S. Government Publishing Office.

Chicago Style (17th ed.) Citation

Obama, Barack. Veto--S. 1 (PM 6): Message from The President of the United States Returning Without My Approval S. 1, The Keystone XL Pipeline Approval Act. Washington: U.S. Government Publishing Office, 2015.

MLA (9th ed.) Citation

Obama, Barack. Veto--S. 1 (PM 6): Message from The President of the United States Returning Without My Approval S. 1, The Keystone XL Pipeline Approval Act. U.S. Government Publishing Office, 2015.