Page 3 - Happy Collo Book
P. 3
Preface
In truth, we could not have achieved this e-book
without strong support from our adviser. We would like to
thank our adviser for her unwavering support.
We apologize for any errors are found in this e-book.
If this book can help any person in providing information,
we will feel that the purpose of this book has been
fulfilled. Please do not hesitate to contact us if you
require any further information.
Pitchaya Rangsai 614302004
Malisa Sirihan 614302017
