Great books of the western world; Vol. XLII
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. V
edited by Mortimer J. Adler
Encyclopedia Britanica, 1990
 Buku Referensi
Great books of the western world; Vol. XIV
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