1. W. Edwards Deming, Out of Crisis (M.I.T. Press, 1986)
2. J. Juran, Juran’s Quality Handbook (McGraw Hill 1951)
3. P. Crosby, Quality is Free. The Art of Making Quality Certain (McGraw Hill, 1979)
4. G. O’ Regan, Introduction to Software Quality (Springer, 2014)
5. M.B. Chrissis, M. Conrad, S. Shrum, CMMI for Development. Guidelines for Process Integration and Product Improvement, 3rd edn. SEI Series in Software Engineering (Addison Wesley, 2011)