BURTON, J. W. (1972). World society. University Press.
Chicago Style (17th ed.) ZitazioaBURTON, John W. World Society. Cambridge: University Press, 1972.
MLA (9th ed.) ZitazioaBURTON, John W. World Society. University Press, 1972.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.