APA引文

Kegley, C. W., & Wittkopf, E. R. (1991). American foreign policy: Pattern and process.

Chicago Edition Citation

Kegley, Charles W., and Eugene R. Wittkopf. American Foreign Policy: Pattern and Process. New York, St Martin's press, 1991.

MLA引文

Kegley, Charles W., and Eugene R. Wittkopf. American Foreign Policy: Pattern and Process. 1991.