1. D.A Aaker (ed), Multivariate Analysis in Marketing: Theory and Application (Belmont, Calif. Wadsworth Publishing Co., 1971).
2. T. Abdel-Malek, Managerial Export-Orientation: A Can-adian Study (University of Western Ontario, 1974).
3. T.W. Anderson, An Introduction to Multivariate Statistical Analysis (New York: Wiley, 1958)
4. Business Monitor M4, Overseas Transactions (HMSO, 1973).
5. P.R. Cateora and J.M. Hess, International Marketing (Illinois: Irwin, 1971).