Cita APA (7a ed.)

Frei, D., & Ruloff, D. (1989). Handbook of foreign policy analysis: Methods for practical application in foreign policy planning, strategic planning, and business risk assessment. Martinus Nijhoff.

Cita Chicago Style (17a ed.)

Frei, Daniel, y Dieter Ruloff. Handbook of Foreign Policy Analysis: Methods for Practical Application in Foreign Policy Planning, Strategic Planning, and Business Risk Assessment. Dordrecht [etc.]: Martinus Nijhoff, 1989.

Cita MLA (9a ed.)

Frei, Daniel, y Dieter Ruloff. Handbook of Foreign Policy Analysis: Methods for Practical Application in Foreign Policy Planning, Strategic Planning, and Business Risk Assessment. Martinus Nijhoff, 1989.