Thom, D. J. (1975). The Niger-Nigeria boundary, 1890-1906: A study of ethnic frontiers and a colonial boundary. Ohio University, Center for International Studies.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रThom, Derrick J. The Niger-Nigeria Boundary, 1890-1906: A Study of Ethnic Frontiers and a Colonial Boundary. Athens: Ohio University, Center for International Studies, 1975.
एमएलए (8वां संस्करण) प्रशस्ति पत्रThom, Derrick J. The Niger-Nigeria Boundary, 1890-1906: A Study of Ethnic Frontiers and a Colonial Boundary. Ohio University, Center for International Studies, 1975.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.