APA (7th ed.) Citation

Proops, J. L. R., Faber, M., Manstetten, R., & Jöst, F. (1996). Achieving a sustainable world. Ecological economics, 17, .

Chicago Style (17th ed.) Citation

Proops, John L. R., Malte Faber, Reiner Manstetten, and Frank Jöst. "Achieving a Sustainable World." Ecological Economics 17 (1996).

MLA (9th ed.) Citation

Proops, John L. R., et al. "Achieving a Sustainable World." Ecological Economics, vol. 17, 1996.