APA (7th ed.) Citation

(1991). Environmental indicators: A preliminary set = Indicateurs d'environnement.

Chicago Style (17th ed.) Citation

Environmental Indicators: A Preliminary Set = Indicateurs D'environnement. Paris, 1991.

MLA (9th ed.) Citation

Environmental Indicators: A Preliminary Set = Indicateurs D'environnement. 1991.

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