G. Okruhlik, «. Excluded-essentials-gwen-moore, and J. A. Whitt, The Politics of Ethnicity, Oil, and Citizenship in Saudi Arabia The Global Color Line Racial and Ethnic Inequality and Struggle from a Global Perspective, Research in Politics & Society, 1999.

A. Voir-par-exemple and . Portes, The Economic Sociology of Immigation, Essays on Networks, Ethnicity and Entrepreneurship, pp.248-279, 1995.

J. Hutchinson and M. Guibernau, Understanding nationalism, pp.83-88, 2001.