International encyclopedia of economics : volume one
editor, Frank N. Magill
Fitzroy Dearborn Publishers, 1997
 Buku Referensi
Encyclopedia of literature; Volume one
edited by Joseph T. Shipley
Philosophical Library, 1946
 Buku Referensi
Turner, CMEP
International encyclopedia of art
Facts on File, 1996
 Buku Teks
International Encyclopedia of goverment and politics
"S.Chand ,
 Buku Teks
International book publishing : an encyclopedia
edited by Philip G. Altbach, Edith S. Hoshino
Fitzroy Dearborn, 1995
 Buku Referensi