Citazione APA

(2000). World Resousces, 1990 - 91: People and Ecosystems : the fraying web of life. Washington, D.C: World Resources Institute.

Stile di citazione Chicago

World Resousces, 1990 - 91: People and Ecosystems : The Fraying Web of Life. Washington, D.C: World Resources Institute, 2000.

Citazione MLA

World Resousces, 1990 - 91: People and Ecosystems : The Fraying Web of Life. Washington, D.C: World Resources Institute, 2000.

Attenzione: Queste citazioni potrebbero non essere precise al 100%.