Nguồn Các_di_chỉ_Gusuku_và_di_sản_liên_quan_của_Vương_quốc_Lưu_Cầu

  • Motoo, Hinago (1986). Japanese Castles. Tokyo: Kodansha. tr. 200 pages. ISBN 0-87011-766-1
  • Kerr, George H. (2000). Okinawa: the History of an Island People. (revised ed.) Boston: Tuttle Publishing.
  • Smits, Gregory (1999). "Visions of Ryukyu: Identity and Ideology in Early-Modern Thought and Politics." Honolulu: University of Hawai'i Press.

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