APA (7. basım) Alıntı

Spiegel, H. W. Current economic problems: 3rd ed. R.D. Irwin, 1961.

Chicago Style (17. basım) Atıf

Spiegel, Henry William. Current Economic Problems: 3rd Ed. Homewood, III.: R.D. Irwin, 1961.

MLA (9th ed.) Atıf

Spiegel, Henry William. Current Economic Problems: 3rd Ed. R.D. Irwin, 1961.