REFERENCES

1. Kotler P. and Amstrong G., (2008), Principles of Marketing 13^th Ed., New Jersey: Prentice hall International
2. Kotler P. and Amstrong G., (2008), Principles of Marketing The Asian Perspective :Prentice hall International
3. Nor Khalidah Abu and Yusniza Kamarulzaman (2009), Principles of Marketing 1^st Ed, Kuala Lumpur: Oxford