[ 1] Project Management Institute. 2006. Practice Standard for Work Breakdown Structures Second Edition. Newtown Square, PA: PMI.

[ 2] Project Management Institute. 2007. Practice Standard for Scheduling. Newtown Square, PA: PMI.

[ 3] Project Management Institute. 2005. Practice Standard for Earned Value Management. Newtown Square, PA: PMI.

[ 4] International Organization for Standardization. 2005. ISO 9000. Quality Management Systems Fundamentals and Vocabulary. Geneva: ISO Press,

[ 5] International Organization for Standardization. 1994. ISO 8402. Quality Management and Quality Assurance. Geneva: ISO Press (Withdrawn 2000).

[ 6] Tuckman, Bruce, 1965. Developmental Sequence in Small Groups. Psychological Bulletin No. 63. Bethesda, MD: Naval Medical Research Institute. http://www.businessballs.com/tuckmanformingstormingnormingperforming.htm.