Dyfyniad APA

EugeneR.Wittkopf, C., Jr. (2004). American foreign policy：pattern and process. 北京大学出版社.

Dyfyniad Arddull Chicago

EugeneR.Wittkopf, CharlesW.Kegley, Jr. American Foreign Policy：pattern and Process. 北京大学出版社, 2004.

Dyfyniad MLA

EugeneR.Wittkopf, CharlesW.Kegley, Jr. American Foreign Policy：pattern and Process. 北京大学出版社, 2004.

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