Cita APA (7th ed.)

Dray, W. H. (1964). Philosophy of history. Prentice-Hall, Inc.

Cita Chicago (17th ed.)

Dray, William H. Philosophy of History. Englewood Cliffs, N. J: Prentice-Hall, Inc, 1964.

Cita MLA (9th ed.)

Dray, William H. Philosophy of History. Prentice-Hall, Inc, 1964.