APA (7th ed.) Citation

Spengler, O., & Werner, H. (1962). The decline of the West (Abridged ed.). Modern Library.

Chicago Style (17th ed.) Citation

Spengler, Oswald, and Helmut Werner. The Decline of the West. Abridged ed. New York: Modern Library, 1962.

MLA (9th ed.) Citation

Spengler, Oswald, and Helmut Werner. The Decline of the West. Abridged ed. Modern Library, 1962.