Behr, K., Kim, G., & Spafford, G. (2010). The visible OPS handbook: Implementing ITIL in practical and auditable steps (First edition revised.). IT Process Institute.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBehr, Kevin, Gene Kim, और George Spafford. The Visible OPS Handbook: Implementing ITIL in Practical and Auditable Steps. First edition revised. Oregon: IT Process Institute, 2010.
एमएलए (8वां संस्करण) प्रशस्ति पत्रBehr, Kevin, et al. The Visible OPS Handbook: Implementing ITIL in Practical and Auditable Steps. First edition revised. IT Process Institute, 2010.
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