Klöpffer, W., & Grahl, B. (2014). Life cycle assessment: A guide to best practice. Wiley-VCH.
芝加哥风格引文Klöpffer, Walter, 与 Birgit Grahl. Life Cycle Assessment: A Guide to Best Practice. Weinheim an der Bergstrasse, Germany: Wiley-VCH, 2014.
MLA引文Klöpffer, Walter, 与 Birgit Grahl. Life Cycle Assessment: A Guide to Best Practice. Wiley-VCH, 2014.
警告：这些引文格式不一定是100％准确.