APA (7. basım) Alıntı

United Nations Environment Programme & United Nations Environment Programme. Governing Council. The State of the environment (Began in 1973.). United Nations Environment Programme.

Chicago Style (17. basım) Atıf

United Nations Environment Programme ve United Nations Environment Programme. Governing Council. The State of the Environment. Began in 1973. Nairobi, Kenya: United Nations Environment Programme.

MLA (9th ed.) Atıf

United Nations Environment Programme ve United Nations Environment Programme. Governing Council. The State of the Environment. Began in 1973. United Nations Environment Programme.