APA (7th ed.) Citation

Gray, C. S. (2011). Hard power and soft power: The utility of military force as an instrument of policy in the 21st century. Strategic Studies Institute, U.S. Army War College.

Chicago Style (17th ed.) Citation

Gray, Colin S. Hard Power and Soft Power: The Utility of Military Force as an Instrument of Policy in the 21st Century. Carlisle, Pa.: Strategic Studies Institute, U.S. Army War College, 2011.

MLA (9th ed.) Citation

Gray, Colin S. Hard Power and Soft Power: The Utility of Military Force as an Instrument of Policy in the 21st Century. Strategic Studies Institute, U.S. Army War College, 2011.