Wichmann, Siegfried, author
Thames & Hudson, 1999
Buku Referensi
Evans, Grant, author
Verso, 1984
Buku Teks
Barbier, Frederic, author
Polity Press, 2017
Buku Teks
Reimann, Mathias, 1955-, author
Transnational Publishers, 1995
Buku Teks
Frederick A. Praeger, 1967
Buku Teks