4. Boatsman, James R. and Sanjay Gupta.1996. Taxes and Cprporate Charity:Empirical Evidence from Microlevel Panel Data. National Tax Journal, (June):193-213.
5. Carlo Bonifazi, Kevin C Desouza. 2004.The ten outsourcing traps to avoid Mark Power, The Journal of Business Strategy. Boston: Vol. 25, Iss. 2:37-42.
7.John A Brierley, Christopher J Cowton, Colin Drury.2006.The Application of Costs in Make-or-Buy Decisions: An Analysisn International Journal of Management. Poole: Vol. 23, Iss. 4:791-801.