Handbook of the birds of Europe the Middle East and North Africa : the birds of the Western Palearctic; Volume 7
edited by Stanley Cramp, C.M. Perrins
Oxford University Press, 1993
 Buku Referensi
Weber, Eugen
The Western tradition
D.C. Heath, 1959
 Buku Teks SO
Burns, Edward McNall, 1897-1972
Western civilizations
W.W Norton, 1980
 Buku Teks
Easton, Stewart C.
The Western heritage
Holt, Rinehart and Winston, 1966
 Buku Teks SO
Sutton, Ian
Western architecture
TThames & Hudson, 2001
 Buku Teks SO