Grapard, Allan G. (1992). The protocol of the gods: a study of the Kasuga cult in Japanese history. University of California Press. ISBN0520070976. OCLC25873140.
Grapard, Allan G. (1992). The protocol of the gods: a study of the Kasuga cult in Japanese history. University of California Press. ISBN0520070976. OCLC25873140.
Ten Grotenhuis, Elizabeth (1999). Japanese mandalas : representations of sacred geography. University of Hawai'i Press. ISBN0824820002. OCLC39181008.