Harrison, R. J. (1974). Europe in question: Theories of regional international integration. New York University Press.
Chicago-referens (17:e uppl.)Harrison, Reginald J. Europe in Question: Theories of Regional International Integration. New York: New York University Press, 1974.
MLA-referens (9:e uppl.)Harrison, Reginald J. Europe in Question: Theories of Regional International Integration. New York University Press, 1974.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.