Friedman, G., & Starr, H. (1997). Agency, structure, and international politics: From ontology to empirical inquiry. Routledge.
Lua i Stíl Chicago (17ú heag.)Friedman, Gil, agus Harvey Starr. Agency, Structure, and International Politics: From Ontology to Empirical Inquiry. London ; New York: Routledge, 1997.
Lua MLA (9ú heag.)Friedman, Gil, agus Harvey Starr. Agency, Structure, and International Politics: From Ontology to Empirical Inquiry. Routledge, 1997.
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