APA (7th ed.) Citation

Spiegel, H. W. (1949). Current economic problems. Blakiston.

Chicago Style (17th ed.) Citation

Spiegel, Henry William. Current Economic Problems. Philadelphia [u.a.]: Blakiston, 1949.

MLA (9th ed.) Citation

Spiegel, Henry William. Current Economic Problems. Blakiston, 1949.

Warning: These citations may not always be 100% accurate.