Block, Jack.The Q-Sort Method in Personality Assessment and Psychiatric Research. Spring-field, Ill.: Charles C. Thomas, 1961.
2.
Kaplan, Morton A.Systems and Process in International Politics. New York : John Wiley & Sons, 1957.
3.
Klingberg, Frank L. "Studies in Measurement of Relations Among Sovereign States." In James N. Rosenau (ed.). International Politics and Foreign Policy. New York: The Free Press of Glencoe, 1961.
4.
Knorr, Klaus, and Verba, Sidney (eds.). The International System. Special Issue, World Politics, 14 (1961), 1-237.
5.
McClelland, Charles A. "Applications of General Systems Theory to International Relations ." In James N. Rosenau (ed.). International Politics and Foreign Policy. New York: The Free Press of Glencoe, 1961a.
6.
—. "The Acute International Crisis." In Klaus Knorr and Sydney Verba (eds.). The International System. Special Issue, World Politics, 14 (1961b), 182-204.
7.
North, Robert C., Koch, Howard E., JR., and Zinnes, Dina A. "The Integrative Functions of Conflict," The Journal of Conflict Resolution, 4 (1960), 355-74.
8.
Osgood, Charles E., Suci, George J., and Tan-Nenbaum, Percy H.The Measurement of Meaning. Urbana, Ill.: University of Illinois Press, 1957.
9.
Schutz, William C. "On Categorizing Qualitative Data in Content Analysis," Public Opinion Quarterly, 22 (1958 -1959), 503-15.
10.
Siegel, S.Non-Parametric Statistics for the Behavioral Sciences. New York: McGraw-Hill, 1956.
11.
Stephenson, William.The Study of Behavior: Q-Technique and Its Methodology. Chicago: The University of Chicago Press, 1953.
12.
Weber, Max.The Methodology of the Social Sciences ( trans. and ed. by Edward A. Shils and Harry A. Finch). Glencoe, Ill.: The Free Press, 1949.
13.
Wright, Quincy.The Study of International Relations. New York: Appleton-Century-Crofts, 1955.
14.
Zaninovich, M. George. "A Suggested Integrative Model for the Study of Affective Expression in World Politics." In Report to the Ford Foundation, Studies in International Conflict and Integration (Robert C. North, Director), Stanford University, August 31, 1961. (Mimeographed.)
15.
Zinnes, Dina A., North, Robert C., and Koch, Howard E., JR. "Capability, Threat, and the Outbreak of War," In James N. Rosenau (ed.). International Politics and Foreign Policy. New York: The Free Press of Glencoe, 1961.