Gaya APA

Brown, L, R. et al (2001). State of the World 2001 : a worldwatch institute report on progress toward a sustainable society . New York: Worldwatch Intitute.

Gaya MLA

Brown, Lester, R.. et al. "State of the World 2001 : a worldwatch institute report on progress toward a sustainable society". New York: Worldwatch Intitute, 2001. Text.