APA Style
Schuon, Frithjof, Modelski, George. ().
Long cycles in world politics .
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Chicago Style
Schuon, Frithjof, Modelski, George.
Long cycles in world politics.
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MLA Style
Schuon, Frithjof, Modelski, George.
Long cycles in world politics.
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.
.
Turabian Style
Schuon, Frithjof, Modelski, George.
Long cycles in world politics.
:
,
.
.