Cita APA (7th ed.)

United Nations Environment Programme. Industry & Environment Office & Heijungs, R. (1996). Life cycle assessment: What it is and how to do it. United Nations Environment Programme Industry and Environment Office.

Cita Chicago (17th ed.)

United Nations Environment Programme. Industry & Environment Office i Reinout Heijungs. Life Cycle Assessment: What It Is and How to Do It. Paris: United Nations Environment Programme Industry and Environment Office, 1996.

Cita MLA (9th ed.)

United Nations Environment Programme. Industry & Environment Office i Reinout Heijungs. Life Cycle Assessment: What It Is and How to Do It. United Nations Environment Programme Industry and Environment Office, 1996.