APA (7th ed.) Citation

Spengler, O. (1926). The decline of the West. A.A. Knopf.

Chicago Style (17th ed.) Citation

Spengler, Oswald. The Decline of the West. New York: A.A. Knopf, 1926.

MLA (8th ed.) Citation

Spengler, Oswald. The Decline of the West. A.A. Knopf, 1926.

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