APA
Higgins R., . (2009). Theories and themes : selected essays, speeches and writings in international law : Set. GB: Oxford University Press.
Chicago
Higgins Rosalyn, . 2009. Theories and themes : selected essays, speeches and writings in international law : Set. GB: Oxford University Press.
Harvard
Higgins R., . (2009). Theories and themes : selected essays, speeches and writings in international law : Set. GB: Oxford University Press.
MLA
Higgins Rosalyn, . Theories and themes : selected essays, speeches and writings in international law : Set. GB: Oxford University Press. 2009.