Dahl. Strategic Challenges in the Baltic Sea Region. Georgetown University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रDahl. Strategic Challenges in the Baltic Sea Region. Georgetown University Press.
एमएलए (8वां संस्करण) प्रशस्ति पत्रDahl. Strategic Challenges in the Baltic Sea Region. Georgetown University Press.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.