Saran Ratanasithi. (2010) The Evolution of AMA s Marketing Definition: An Important Change from Narrow to Broad Marketing. <i>NIDA Development Journal</i>, <i>50</i>(1), 127-144.Saran Ratanasithi. "The Evolution of AMA s Marketing Definition: An Important Change from Narrow to Broad Marketing". NIDA Development Journal 50 (2010):127-144.Saran Ratanasithi. The Evolution of AMA s Marketing Definition: An Important Change from Narrow to Broad Marketing. National Institute of Development Administration:ม.ป.ท. 2010.