Black, C. E., Falk, R. A., Knorr, K. E., & Young, O. R. (1968). Neutralization and world politics. Princeton University.

Black, Cyril E., Richard A. Falk, Klaus E. Knorr, and Oran R. Young. Neutralization and World Politics. Princeton: Princeton University, 1968.

Black, Cyril E., et al. Neutralization and World Politics. Princeton University, 1968.