APA (7th ed.) Citation

Brown, L. R., Flavin, C., Postel, S., & Starke, L. (1991). L'état de la planète: 1991. Paris: Economica.

Chicago Style (17th ed.) Citation

Brown, Lester R., Christopher Flavin, Sandra Postel, and Linda Starke. L'état De La Planète: 1991. Paris: Economica, 1991.

MLA (8th ed.) Citation

Brown, Lester R., et al. L'état De La Planète: 1991. Paris: Economica, 1991.