Great books of the western world; Vol. LI
edited by Mortimer J. Adler
Encyclopedia Britanica, 1990
 Buku Referensi
Great books of the western world; Vol. LVI
edited by Mortimer J. Adler
Encyclopedia Britanica, 1990
 Buku Referensi
Great books of the western world; Vol. X
edited by Mortimer J. Adler
Encyclopedia Britanica, 1990
 Buku Referensi
Great books of the western world; Vol. IV
edited by Mortimer J. Adler
Encyclopedia Britanica, 1990
 Buku Referensi
Great books of the western world; Vol. XXXII
edited by Mortimer J. Adler
Encyclopedia Britanica, 1990
 Buku Referensi