APA (7th ed.) Citation

(1990). The Europa world yearbook 1990 (31st ed.). Europa Publications.

Chicago Style (17th ed.) Citation

The Europa World Yearbook 1990. 31st ed. London: Europa Publications, 1990.

MLA (8th ed.) Citation

The Europa World Yearbook 1990. 31st ed. Europa Publications, 1990.

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