8K. Davis, "Social Science Approaches to International Migration" , in M·S. Teitelhaum and J.M.W (eds.),Population and Resources in Western Intellectual Traditions, New York,The Population Council, 1988.259.
9Alejandro Portes. 2003. "Conclusion: Theoretical Convergencies and Empirical Evidence in the Study of Immigrant Transnationalism." Intemational Migration Review,Vol. 37 (3): 874-892.
10Ruben G Rumbaut, Nancy Foner and Steven J Gold (1999) Immigration and Immigration Research in the United States,The American Behavioral Scientist, Jun/jul, Vol, 42, Iss 9.