Jien, Delmer Myers BrownThe Future and the Past: A Translation and Study of the Gukanshō. (em inglês) University of California Press, 1979 p. 315 ISBN 9780520034600
Jien, Delmer Myers BrownThe Future and the Past: A Translation and Study of the Gukanshō. (em inglês) University of California Press, 1979 p. 313 ISBN 9780520034600
Jien, Delmer Myers BrownThe Future and the Past: A Translation and Study of the Gukanshō. (em inglês) University of California Press, 1979 p. 318 ISBN 9780520034600