APA (7th ed.) Citation

Martin, P. W. (1929). Unemployment and purchasing power. P. S. King.

Chicago Style (17th ed.) Citation

Martin, P. W. Unemployment and Purchasing Power. London: P. S. King, 1929.

MLA (9th ed.) Citation

Martin, P. W. Unemployment and Purchasing Power. P. S. King, 1929.