Cita APA

Spiegel, H. W. (1961). Current economic problems (3.).

Chicago Edition Citation

Spiegel, Henry William. Current Economic Problems. 3. Richard D Irwin, Inc, Illinois, 1961.

Cita MLA

Spiegel, Henry William. Current Economic Problems. 3. 1961.

Atenció: Aquestes cites poden no estar 100% correctes.