APA-ийн эшлэл(7 дахь хэвлэлт)

Spafford, G. (2009). Greening the data center: Opportunities for improving data center energy efficiency. IT Governance Pub..

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Spafford, George. Greening the Data Center: Opportunities for Improving Data Center Energy Efficiency. Ely, U.K.: IT Governance Pub., 2009.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Spafford, George. Greening the Data Center: Opportunities for Improving Data Center Energy Efficiency. IT Governance Pub., 2009.