APA (7th ed.) Citation

Harrison, H. V. (1964). The role of theory in international relations. D. van Nostrand.

Chicago Style (17th ed.) Citation

Harrison, Horace V. The Role of Theory in International Relations. Princeton: D. van Nostrand, 1964.

MLA (9th ed.) Citation

Harrison, Horace V. The Role of Theory in International Relations. D. van Nostrand, 1964.