Mass, J. P. (1979). The development of Kamakura rule, 1180 - 1250: A history with documents. Stanford, Calif: Stanford University Press.

Mass, Jeffrey P. The Development of Kamakura Rule, 1180 - 1250: A History With Documents. Stanford, Calif: Stanford University Press, 1979.

Mass, Jeffrey P. The Development of Kamakura Rule, 1180 - 1250: A History With Documents. Stanford, Calif: Stanford University Press, 1979.