Cita APA (7th ed.)

Klöpffer, W., & Grahl, B. (2014). Life cycle assessment: A guide to best practice. Wiley-VCH.

Cita Chicago (17th ed.)

Klöpffer, Walter, i Birgit Grahl. Life Cycle Assessment: A Guide to Best Practice. Weinheim an der Bergstrasse, Germany: Wiley-VCH, 2014.

Cita MLA (9th ed.)

Klöpffer, Walter, i Birgit Grahl. Life Cycle Assessment: A Guide to Best Practice. Wiley-VCH, 2014.