APA (7th ed.) Citation

(1987). 1987: The state of the world environment. UNEP.

Chicago Style (17th ed.) Citation

1987: The State of the World Environment. Nairobi: UNEP, 1987.

MLA (9th ed.) Citation

1987: The State of the World Environment. UNEP, 1987.

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