[1] Project Management Institute. 2008. A Guide to the Project Management Body of Knowledge (PMBOK® Guide)—Fourth Edition. Newtown Square, PA: PMI
[2] American National Standards Institute. 2007. ANSI/EIA-748-A-1998 Earned Value Management Systems. New York, NY: ANSI.
[3] Project Management Institute. 2006. Practice Standard for Work Breakdown Structures—Second Edition. Newtown Square, PA: PMI.
[4] Lipke, W. H. 2009. Earned Schedule. Oklahoma City, OK: Walter H. Lipke, p. 4.
[5] Project Management Institute. 2007. Practice Standard for Scheduling. Newtown Square, PA: PMI.
[6] Project Management Institute. 2010. Practice Standard for Project Estimating. Newtown Square, PA: PMI.
[7] Project Management Institute. 2009. Practice Standard for Project Risk Management. Newtown Square, PA: PMI.
[8] Fleming, Q.W. and Koppelman, J. M. 2010. Earned Value Project Management. Fourth Edition. Newtown Square, PA: PMI.