APA (7th ed.) Citation

Obama, B., & Karp, D. (2014). The First-Ever White House Tumblr Q&A. United States. White House.

Chicago Style (17th ed.) Citation

Obama, Barack, and David Karp. The First-Ever White House Tumblr Q&A. District of Columbia: United States. White House, 2014.

MLA (9th ed.) Citation

Obama, Barack, and David Karp. The First-Ever White House Tumblr Q&A. United States. White House, 2014.

Warning: These citations may not always be 100% accurate.