Murata, Kiyoaki
Weatherhill , 1971
Buku Teks
Soka Gakkai,, 2002
Buku Referensi
Ikeda, Daisaku, 1928-, author
[publisher not identified], [date of publication not identified]
Buku Teks
Bethel, Dayle M.
Weatherhill , 1994
Buku Teks
Japan Times, 2003
Buku Teks