Obama, B., Cameron, D., Hall, M., Landale, J., Meckler, L., & Bradby, T. (2010). [U.S. President Barack Obama and British Prime Minister David Cameron hold a press conference after meeting at the White House]. Whitehouse.gov.
Chicago Style (17th ed.) CitationObama, Barack, David Cameron, Mimi Hall, James Landale, Laura Meckler, and Tom Bradby. [U.S. President Barack Obama and British Prime Minister David Cameron Hold a Press Conference After Meeting at the White House]. [Washington, D.C.]: Whitehouse.gov, 2010.
MLA (9th ed.) CitationObama, Barack, et al. [U.S. President Barack Obama and British Prime Minister David Cameron Hold a Press Conference After Meeting at the White House]. Whitehouse.gov, 2010.
Warning: These citations may not always be 100% accurate.