Kunstler, Mort, author
The American spirit
Harry N. Abrams, 1986
 Buku Referensi
Beard, Charles A., author
The American spirit
Macmillan, 1942
 Buku Teks
Wooldridge, S. W.
The Spirit and purpose of geography
Hutchinson University Library,, 1970
 Buku Teks
Weymouth, Anthony
The english spirit / Anthony Weymouth
Ljus Forlag, 1944
 Buku Teks
Weber, Max, 1864-1920, author
The protestant ethic and the spirit of capitalism
Routledge Classics , 2001
 Buku Teks
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