APA
Crawford J., Koskenniemi M., . (2012). The Cambridge companion to international law. Cambridge: Cambridge University Press.
Chicago
Crawford James, Koskenniemi Martti, . 2012. The Cambridge companion to international law. Cambridge: Cambridge University Press.
Harvard
Crawford J., Koskenniemi M., . (2012). The Cambridge companion to international law. Cambridge: Cambridge University Press.
MLA
Crawford James, Koskenniemi Martti, . The Cambridge companion to international law. Cambridge: Cambridge University Press. 2012.