^ Helen Craig McCullough (1985) Kokin Wakashū: The First Imperial Anthology of Japanese Poetry; with Tosa Nikki and Shinsen Waka, illustrated, reprint edition, Stanford University Press, →ISBN, pages 8-9
^ Haruo Shirane, Sonja Arntzen, translator (2008) Traditional Japanese Literature: An Anthology, Beginnings to 1600 (Columbia University Press: Translations from the Asian classics), illustrated edition, Columbia University Press, →ISBN, page 31
^ Mujū Ichien (1985) Robert E. Morrell, editor, Sand and Pebbles: The Tales of Muju Ichien, A Voice for Pluralism in Kamakura Buddhism (Bibliotheca Persica), illustrated edition, SUNY Press, →ISBN, page 317