APA

KEGLEY C. W., WITTKOPF E. R., . (1987). American foreign policy. New York: St. Martin's Press.

Chicago

KEGLEY Charles W, WITTKOPF Eugene R, . 1987. American foreign policy. New York: St. Martin's Press.

Harvard

KEGLEY C. W., WITTKOPF E. R., . (1987). American foreign policy. New York: St. Martin's Press.

MLA

KEGLEY Charles W, WITTKOPF Eugene R, . American foreign policy. New York: St. Martin's Press. 1987.