Gray Hat Hacking The Ethical Hackers Handbook, 3rd EditionAllen Harper, Shon Harris, Jonathan Ness, Chris Eagle, Gideon Lenkey, Terron WilliamsJanuary 6, 2011
Practical Software Project Estimation: A Toolkit for Estimating Software Development Effort & DurationPeter Hill, International Software Benchmarking Standards GroupSeptember 10, 2010