Tohutoro APA (7th ed.)
Dray, W. H. Philosophy of History. Prentice-Hall.
Tohutoru Kātū Chicago (17th ed.)
Dray, William H. Philosophy of History. Englewood Cliffs, EUA: Prentice-Hall.
Tohutoro MLA (9th ed.)
Dray, William H. Philosophy of History. Prentice-Hall.
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