African Studies Association of the United Kingdom & Dorward, D. C. (1981). Annual departmental reports relating to Sierra Leone, 1893-1961. EP Microform.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रAfrican Studies Association of the United Kingdom और D. C. Dorward. Annual Departmental Reports Relating to Sierra Leone, 1893-1961. Wakefield: EP Microform, 1981.
एमएलए (8वां संस्करण) प्रशस्ति पत्रAfrican Studies Association of the United Kingdom और D. C. Dorward. Annual Departmental Reports Relating to Sierra Leone, 1893-1961. EP Microform, 1981.
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