Ayres, C.E.
Universty of Taxas Press , 1961
Buku Teks
Conrad, Peter, author
Thames and Hudson, 1998
Buku Referensi
Toynbee, Arnold J., author
Oxford University Press, 2007
Buku Teks
Lefebvre, Henri
Verso, 1995
Buku Teks
Eco, Umberto, author
Jalasutra, 1986
Buku Teks