"防衛省、防空識別圏を拡大 与那国上空のみ西方26キロ" [Ministry of Defense extends the air defense identification zone, 26 km west above Yonaguni Island]. The Ryukyu Shimpo. 25 June 2010. Archived from the original on 2 December 2013. Retrieved 27 November 2013.
"The Commander's Handbook on the Law of Naval Operations". Department of the Navy Office of the Chief of Naval Operations and Headquarters, U.S. Marine Corps, Department of Homeland Security and U.S. Coast Guard. July 2007. Archived from the original on 2 December 2013. Retrieved 30 November 2011.
"The Commander's Handbook on the Law of Naval Operations". Department of the Navy Office of the Chief of Naval Operations and Headquarters, U.S. Marine Corps, Department of Homeland Security and U.S. Coast Guard. July 2007. Archived from the original on 2 December 2013. Retrieved 30 November 2011.
"防衛省、防空識別圏を拡大 与那国上空のみ西方26キロ" [Ministry of Defense extends the air defense identification zone, 26 km west above Yonaguni Island]. The Ryukyu Shimpo. 25 June 2010. Archived from the original on 2 December 2013. Retrieved 27 November 2013.