United Nations Environment Programme. (2007). Life cycle management: A business guide to sustainability. UNEP.
Chicagoスタイル(17版)引用形式United Nations Environment Programme. Life Cycle Management: A Business Guide to Sustainability. Nairobi, Kenya: UNEP, 2007.
MLA(9版)引用形式United Nations Environment Programme. Life Cycle Management: A Business Guide to Sustainability. UNEP, 2007.
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