Soka Gakkai,, 2002
Buku Referensi
Humphreys, Christmas, author
Curzon Press, 1994
Buku Referensi
Murata, Kiyoaki
Weatherhill , 1971
Buku Teks
Soothill, W.E. (William Edward), author
Motilal Banarsidass Publishers Private Limites, 1937
Buku Referensi
Ikeda, Daisaku, 1928-, author
[publisher not identified], [date of publication not identified]
Buku Teks