Hutchinson, T. J. (1970). Impressions of Western Africa: With remarks on the diseases of the climate and a report on the peculiarities of trade up the rivers in the Bight of Biafra. F. Cass.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Hutchinson, Thomas J. Impressions of Western Africa: With Remarks on the Diseases of the Climate and a Report on the Peculiarities of Trade Up the Rivers in the Bight of Biafra. London: F. Cass, 1970.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Hutchinson, Thomas J. Impressions of Western Africa: With Remarks on the Diseases of the Climate and a Report on the Peculiarities of Trade Up the Rivers in the Bight of Biafra. F. Cass, 1970.
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