APA citiranje

Spengler, O. (1934). The hour of decision: Germany and world-historical evolution. New York: A. A. Knopf.

Trích dẫn kiểu Chicago

Spengler, Oswald. The Hour of Decision: Germany and World-historical Evolution. New York: A. A. Knopf, 1934.

MLA citiranje

Spengler, Oswald. The Hour of Decision: Germany and World-historical Evolution. New York: A. A. Knopf, 1934.

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