Otto Frederick Warmbier
- "The video that North Korea says proves US student tried to steal banner". independent.co.uk. March 18, 2016. 喺June 15, 2017搵到.
- "North Korea Says It's Holding U.S. Student for 'Hostile Act'". The New York Times. January 23, 2016. 喺January 23, 2016搵到.
Young Pioneer Tours, a China-based company that operates tours to North Korea, said in a statement that one of its clients, identified as "Otto," was being detained in the North Korean capital, Pyongyang.
- Svrluga, Susan (June 19, 2017). "Otto Warmbier dies days after release from North Korean detainment". The Washington Post. 喺June 19, 2017搵到.Template:Subscription needed
- "John McCain: Otto Warmbier 'murdered by the Kim Jong-un regime'", Washington Examiner, June 19, 2017
- "Otto Warmbier Got an Extra Dose of Brutality From North Korea. The Mystery Is Why.", New York Times, June 14, 2017