Great books of the western world
editor in chief, Mortimer J. Adler
Encyclopedia Britanica, 1990
 Buku Referensi
Great books of the western world
editor in cheief, Mortimer J. Adler
Encyclopedia Britanica, 1996
 Buku Referensi
Great books of the western world
Adler, Mortimer J., 1902-2001 (change)
Chicago, Encyclopedia Britanica, Inc, 1990,
 Buku Referensi
Great books of the western world
Adler, Mortimer J., editor in chief
Chicago, Encyclopedia Britanica, Inc, 1990, 1994
 Buku Referensi
Great books of the western world
Adler, Mortimer J., 1902-2001 (change)
Chicago, Encyclopedia Britanica, Inc, 1990,
 Buku Referensi