United Nations Environment Programme. Industry and Environment. (1997). Product Development and the Environment: Volume 20, No. 1 - 2, January - June 1997, Double issue.
Цитирование в стиле Чикаго (17-е изд.)United Nations Environment Programme. Industry and Environment. Product Development and the Environment: Volume 20, No. 1 - 2, January - June 1997, Double Issue. Paris, 1997.
Цитирование MLA (8-е изд.)United Nations Environment Programme. Industry and Environment. Product Development and the Environment: Volume 20, No. 1 - 2, January - June 1997, Double Issue. 1997.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.