Great books of the western world; Vol. XIII
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. XVIII
edited by Mortimer J. Adler
Encyclopedia Britanica, 1990
 Buku Referensi
Great books of the western world; Vol. XXIII
edited by Mortimer J. Adler
Encyclopedia Britanica, 1990
 Buku Referensi
Great books of the western world; Vol. LI
edited by Mortimer J. Adler
Encyclopedia Britanica, 1990
 Buku Referensi