1-Kotler, Philip & Armstrong Gary (2010). Principles of Marketing,Thirteenth Edition, Pearson Education Inc.
2- Kotler, Philip (2000). Marketing Management, The Millenium Edition,Prentice Hall Inc.
3- Masterson, Rosalind& Pickton David (2004). Marketing an Introduction, Mc Graw Hill.
4.Kotler, Philip&kELLER, Kevin Lane (2009). Marketing Management, 13th Edition, Pearson International Edition