Schomburgk, R. H. (1970). A description of British Guiana, geographical and statistical: Exhibiting its resources and capabilities, together with the present and future condition and prospects of the colony. F. Cass.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Schomburgk, Robert H. A Description of British Guiana, Geographical and Statistical: Exhibiting Its Resources and Capabilities, Together with the Present and Future Condition and Prospects of the Colony. [London]: F. Cass, 1970.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Schomburgk, Robert H. A Description of British Guiana, Geographical and Statistical: Exhibiting Its Resources and Capabilities, Together with the Present and Future Condition and Prospects of the Colony. F. Cass, 1970.
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