Chalida Sangnin และ Anawat Sungpet. (2011) Reduction of caffeine in green tea by corn cob /. King Mongkut's University of Technology Thonburi,:ม.ป.ท.Chalida Sangnin และ Anawat Sungpet. 2011. Reduction of caffeine in green tea by corn cob /. ม.ป.ท.:King Mongkut's University of Technology Thonburi,;Chalida Sangnin และ Anawat Sungpet. Reduction of caffeine in green tea by corn cob /. ม.ป.ท.:King Mongkut's University of Technology Thonburi, 2011. Print.