Jabarkan Lihat juga dari Ryuka dalam bahasa melayu

Kei Higa Okinawa Encyclopedia1983, Okinawa Times, Naha, jou, chu, ge.

Yoji Aoyama Ryūka Omoshiro Tokuhon (Interesting Ryukas) 1998, Kyodo Shuppan, Naha

Nihon Shodou Bijutukan　Ryuka - the heart of the poems of the Southern Island 1992, Kyoiku Shodo Shuppan Kyokai, Tokyo

Masanori Nakahodo Various aspects of Okinawan literature, Postwar literature, Dialect poems, Dramas, Ryūka, Tanka 2010, Borderink, Naha, ISBN 978-4-89982-168-7