Lua APA (7ú heag.)
Calder, A. (2009). The green office: A business guide. IT Governance Pub..
Lua i Stíl Chicago (17ú heag.)
Calder, Alan. The Green Office: A Business Guide. Ely, U.K.: IT Governance Pub., 2009.
Lua MLA (9ú heag.)
Calder, Alan. The Green Office: A Business Guide. IT Governance Pub., 2009.
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