The Kirkpatrick Four Levels – A Fresh Look After 55 Years, (May 2014).
 Al-Araimi, F, (2011), Power of Human Resources, Author House
 Handy, L.A, (2008), The Importance of the Work Environment Variables on Transfer of Training, ProQuest.
 Saks, A.M. & Belcourt, M, (2006), An Investigation of Training Activities and Transfer of Training in Organisations, Human Resource Management, Winter, Vol.45, No.4, pp. 629-648.
 Transfer of training, (2012), Business Dictionary, Available at: http://www.businessdictionary.com/defi nition/transfer-of-training.html.
 Werner, J.M. & DeSimone, R.L, (2008), Human Resource Development, Cengage Learning.
 https://www.opm.gov/wiki/training/Training-Transfer/ History.aspx?Revision=30.
 https://www.shiftelearning.com/blog/improving-know le dge-transfer.