Παραπομπή APA

Clarke, M. E., & White, B. E. (1989). Understanding foreign policy: The foreign policy systems approach.

Παραπομπή Chicago Style

Clarke, Michael; Ed, και Brian; Ed White. Understanding Foreign Policy: The Foreign Policy Systems Approach. England, Edward Elgar, 1989.

Παραπομπή MLA

Clarke, Michael; Ed, και Brian; Ed White. Understanding Foreign Policy: The Foreign Policy Systems Approach. 1989.