"Shō En." Okinawa konpakuto jiten (沖縄コンパクト事典, "Okinawa Compact Encyclopedia"). Ryukyu ShimpoArchiviato il 14 settembre 2015 in Internet Archive. (琉球新報). 1 March 2003. Accessed 30 October 2008.
web.archive.org
"Shō En." Okinawa konpakuto jiten (沖縄コンパクト事典, "Okinawa Compact Encyclopedia"). Ryukyu ShimpoArchiviato il 14 settembre 2015 in Internet Archive. (琉球新報). 1 March 2003. Accessed 30 October 2008.