APA aipamena

Hopkins,Terence K. (1982). World systems analysis: Theory and methdology. Sage Publications.

Chicago Style aipamena

Hopkins,Terence K. World Systems Analysis: Theory and Methdology. London: Sage Publications, 1982.

MLA aipamena

Hopkins,Terence K. World Systems Analysis: Theory and Methdology. Sage Publications, 1982.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.