We would like to express my sincere thanks to my thesis advisor, Dr. Pard Teekasep for her invaluable help and constant encouragement throughout the course of this research. We are most grateful for her teaching and advice, not only the research methodologies but also many other methodologies in life. We would not have achieved this far and this thesis would not have been completed without all the support that I have always received from her.
In addition, we are grateful for the teachers of marketing management: Asst. Prof. Dr. Tiwa Park, and others person for suggestions and all their help.
Finally, we most gratefully acknowledge my parents and all people in my Middleton house for all their support throughout the period of this research.