บรรณานุกรม

Azar, Betty Schrampfer (1993).   Understanding and Using English Grammar.  Chartbook: A Reference           Grammar.  2nd Edition.  Englewood Cliffs, New Jersey: Prentice-Hall.
Brieger, Nick and Comfort, Jeremy (1992).  Language Reference for Business English: Grammar,          

          Functions, and Communication Skills.  Hertfordshire: Prentice Hall International (UK).
Collins Cobuild English Grammar (1990).  London: Collins.
McClelland, Lorraine Dubois and Marcotte, Patricia Hale (2007).   Writing Matters! 1st Edition,

          International Edition.  Singapore: McGraw-Hill.
Murphy, Raymond (1996).   Essential Grammar in Use: a self-study reference and practice book for

          elementary students of English: with answers.  Cambridge: Cambridge University Press.
Quirk, R., Greenbaum, S., Leech, G. and Svartvik, J. (1985).   A Comprehensive Grammar of the

          English Language.  London: Longman Group.
“Chao Phraya flood peak Sun, Mon” Retrieved from

          http://www.bangkokpost.com/breakingnews/202739/chao-phaya-high-  water-dec-24-25

          on October 22, 2010.
“Thailand’s silk road to global fame” Retrieved from

          http://www.bangkokpost.com/travel/localtrips/202668/thailand-silk-road-to-global-fame

          on October 22, 2010.