Japanska era – razlika između verzija

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* Brown, Delmer M. and Ichirō Ishida, eds. (1979). ''Gukanshō: The Future and the Past.'' Berkeley: University of California Press. 10-ISBN 0-520-03460-0; 13-ISBN 978-0-520-03460-0; [http://www.worldcat.org/title/future-and-the-past-a-transl-and-study-of-the-gukansho-an-interpretative-history-of-japan-written-in-1219/oclc/251325323 OCLC 251325323]

* ''[[Daijirin]]'', 2nd edition.