Spengler, O. (1918). The decline of the west. AUWSF.
Lua i Stíl Chicago (17ú heag.)Spengler, Oswald. The Decline of the West. London: AUWSF, 1918.
Lua MLA (9ú heag.)Spengler, Oswald. The Decline of the West. AUWSF, 1918.
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