Harrison, H. V. (1964). The role of theory in international relations. D. van Nostrand.
Citazione stile Chigago Style (17a edizione)Harrison, Horace V. The Role of Theory in International Relations. Princeton: D. van Nostrand, 1964.
Citatione MLA (9a ed.)Harrison, Horace V. The Role of Theory in International Relations. D. van Nostrand, 1964.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.