Sheldon, C., & Yoxon, M. (2007). Environmental management systems: A step-by-step guide to implementation and maintenance (3rd ed.). Earthscan.
Цитирование в стиле Чикаго (17-е изд.)Sheldon, Christopher, и Mark Yoxon. Environmental Management Systems: A Step-by-step Guide to Implementation and Maintenance. 3rd ed. London ; Sterling, VA: Earthscan, 2007.
Цитирование MLA (8-е изд.)Sheldon, Christopher, и Mark Yoxon. Environmental Management Systems: A Step-by-step Guide to Implementation and Maintenance. 3rd ed. Earthscan, 2007.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.