Citazione APA

Roberts Leslie, E. (1998). World Resources 1998-99: A Guide To The Global Environment. Oxford.

Stile di citazione Chicago

Roberts Leslie, Ed. World Resources 1998-99: A Guide To The Global Environment. New York: Oxford, 1998.

Citazione MLA

Roberts Leslie, Ed. World Resources 1998-99: A Guide To The Global Environment. Oxford, 1998.