APA (7th ed.) Citation

Spengler, O. (2006). The decline of the west. Vintage Books.

Chicago Style (17th ed.) Citation

Spengler, Osward. The Decline of the West. NY: Vintage Books, 2006.

MLA (9th ed.) Citation

Spengler, Osward. The Decline of the West. Vintage Books, 2006.

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