Political Economy of the World-System Conference, American Sociological Association, University of Illinois at Urbana-Champaign. Dept. of Sociology, & Martin, W. G. (1990). Semiperipheral states in the world-economy. Greenwood Press.
Παραπομπή σε μορφή Chicago (17η εκδ.)Political Economy of the World-System Conference, American Sociological Association, University of Illinois at Urbana-Champaign. Dept. of Sociology, και William G. Martin. Semiperipheral States in the World-economy. New York: Greenwood Press, 1990.
Παραπομπή σε μορφή MLA (9th εκδ.)Political Economy of the World-System Conference, et al. Semiperipheral States in the World-economy. Greenwood Press, 1990.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.