Cita APA (7th ed.)

United Nations Environment Programme. (1991). Tanneries and the environment: A technical guide to reducing the environmental impact of tannery operations. United Nations Environment Programme.

Cita Chicago (17th ed.)

United Nations Environment Programme. Tanneries and the Environment: A Technical Guide to Reducing the Environmental Impact of Tannery Operations. Paris: United Nations Environment Programme, 1991.

Cita MLA (9th ed.)

United Nations Environment Programme. Tanneries and the Environment: A Technical Guide to Reducing the Environmental Impact of Tannery Operations. United Nations Environment Programme, 1991.