United nations. (1999). Greenhouse gas emissions trading: Defining the principles, modalities, rules and guidelines for verification, reporting and accountability. United nations.
Цитирование в стиле Чикаго (17-е изд.)United nations. Greenhouse Gas Emissions Trading: Defining the Principles, Modalities, Rules and Guidelines for Verification, Reporting and Accountability. Geneva: United nations, 1999.
Цитирование MLA (8-е изд.)United nations. Greenhouse Gas Emissions Trading: Defining the Principles, Modalities, Rules and Guidelines for Verification, Reporting and Accountability. United nations, 1999.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.