Ikeda, Daisaku, 1928-
Life : an enigma, a precious jewel
Kodansha International, 1982
 Buku Teks
Scott, Paul
The jewel in the crown / Paul Scott
Panther Books, 1983
 Buku Teks
Field, Andy P.
Discovering statistics : the reality enigma
SAGE Publications, 2016
 Buku Teks
Dalziel, Allan
Evatt the Enigma / by Allan Dalziel
Lansdowne Press, 1967
 Buku Teks
Bidasari jewel of Malay muslim culture
edited by Julian Millie
KITLV Press, 2004
 Buku Teks