1987-1992, the global 500 :
the roll of honour for environmental achievement.
APA Citation
United Nations Environment Programme. (1993). 1987-1992, the global 500: the roll of honour for environmental achievement. Nairobi, Kenya: United Nations Environment Programme.
MLA Citation
United Nations Environment Programme. 1987-1992, the Global 500: the Roll of Honour for Environmental Achievement. Nairobi, Kenya: United Nations Environment Programme, 1993.
Warning: These citations may not always be complete (especially for serials).