Cita APA (7th ed.)

Walsh, W. H. (1967). An introduction to philosophy of history (3a. ed.). Hutchinson University.

Cita Chicago (17th ed.)

Walsh, W. H. An Introduction to Philosophy of History. 3a. ed. Londres: Hutchinson University, 1967.

Cita MLA (9th ed.)

Walsh, W. H. An Introduction to Philosophy of History. 3a. ed. Hutchinson University, 1967.