5Hoekman and Kostecki.The Political Economy of the World Trading System-From GATT to WTO.Oxford University Press.
6Peterson.J and Barras.R.Measuring. "International Competitiveness In Service", Service Industries journal, 1987, 7.
7Peterson.J."Export Shares and Revealed comparative Advantage: A Study of International travel", Applied economics,1998, 20.
8Griliches Zvi.Output Measurement in the Service Sectom.The University of Chicago Press, 1992.
9Peter J.Buckley: Measures of International Competitiveness: A Critical Survey, Journal of marketing management 1988 (4) , P175-200.
10John F. Hellwell &Chung. "Aggregate Productivity and Growth in an International Comparative Setting" , International Productivity and Competitiveness.1992,PP.49-79.