APA (7th ed.) Citation

(1989). The USSR in the 1990s. The Economist Intelligence Unit.

Chicago Style (17th ed.) Citation

The USSR in the 1990s. The Economist Intelligence Unit, 1989.

MLA (8th ed.) Citation

The USSR in the 1990s. The Economist Intelligence Unit, 1989.

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