Revesz, G
Longmans, 1956
Buku Teks
Mithen, steven
Thames and Hudson, 1996
Buku Teks
Barnard, Alan, author
Cambridge University Press, 2016
Buku Teks
Shipley, Joseph T., author
Philosophical Library, 1945
Buku Referensi
Partridge, Eric, 1894-1979, author
Routledge, 1991
Buku Referensi