APA
Gumpel W., . (1999). Turkey as a Political and Economic Factor in Europe and Central Asia. München: Südosteuropa-Gesellschaft.
Chicago
Gumpel Werner, . 1999. Turkey as a Political and Economic Factor in Europe and Central Asia. München: Südosteuropa-Gesellschaft.
Harvard
Gumpel W., . (1999). Turkey as a Political and Economic Factor in Europe and Central Asia. München: Südosteuropa-Gesellschaft.
MLA
Gumpel Werner, . Turkey as a Political and Economic Factor in Europe and Central Asia. München: Südosteuropa-Gesellschaft. 1999.