APA (7th ed.) Citation

(1993). The Soviet Union, 1917-1991. Longman.

Chicago Style (17th ed.) Citation

The Soviet Union, 1917-1991. Longman, 1993.

MLA (8th ed.) Citation

The Soviet Union, 1917-1991. Longman, 1993.

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