APA

Brown L. R., Flavin C. & French H. (1999). State of the world. New York: Worldwatch Institute.

Chicago

Brown Lester R, Flavin Christopher and French Hilary. 1999. State of the world. New York: Worldwatch Institute.

Harvard

Brown L. R., Flavin C. and French H. (1999). State of the world. New York: Worldwatch Institute.

MLA

Brown Lester R, Flavin Christopher and French Hilary. State of the world. New York: Worldwatch Institute. 1999.