APA (7th ed.) Citation

Spengler, O. (1922). Welthistorische Perspektiven. Beck.

Chicago Style (17th ed.) Citation

Spengler, Oswald. Welthistorische Perspektiven. München: Beck, 1922.

MLA (8th ed.) Citation

Spengler, Oswald. Welthistorische Perspektiven. Beck, 1922.

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