Mortimer J. Adler, editor in chief
Encyclopedia Britanica, 1996
Buku Referensi
Mortimer J. Adler, editor in chief
Encyclopedia Britanica, 1994
Buku Referensi
Mortimer J. Adler, editor in chief
Encyclopedia Britanica,
Buku Referensi
Mortimer J. Adler, editor in chief
Encyclopedia Britanica, 1995
Buku Referensi
Mortimer J. Adler, editor in chief
Encyclopedia Britanica,
Buku Referensi