Campbell, J. 1860.Notes on the antiquities, natural history, &c. &c. of Cambodia, compiled from manuscripts of the late E.F.J. Forrest, and from information derived from the Rev. Dr. House.Journal of the Royal Geographical Society 30: 182-198, map 1.
Campbell, J. 1823.Reisen in Sud-Afrika auf Veranlassung der Missions-Gesellschaft zu London unternommen.Weimar, Landes-Industrie-Comptoir.
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Campbell, J. 1823.Ueber die von dem Missionair Campbell entdeckte neue Art Rhinoceros.Illyrisches Blatt no. 51 (19 December 1823): 1-2.
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Campbell, J. 1823.Voyage a Maschaou et a Kourritchan.Nouvelles Annales des Voyages 20: 416-419.
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Campbell, J. 1822.The unicorn.Calcutta Journal of Politics and General Literature 5 (210, September 2): 5, fig. 1.
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Campbell, J. 1822.Discovery of a rhinoceros in South Africa.Arnhemsche Courant no. 9 (19 January 1822): 1-2.
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Campbell, J. 1822.Ueber die von dem Missionair Campbell entdeckte neue Art Rhinoceros.Notizen aus dem Gebiete der Natur- und Heilkunde 2 (7; no. 29, March 1822): 96, fig. 1.
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Campbell, J. 1822.Travels in South Africa, undertaken at the request of the London Missionary Society; being a narrative of a second journey into the interior of that country.London, Francis Westley: vol. 1, pp. i-viii, i-xii, 1-322; vol. 2, p. i-ii, 1-384.
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Campbell, J. 1822.The unicorn.Manchester Iris; or, Literary and Scientific Miscellany 4 (1), February 23: 29, fig. 1.
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Campbell, J. 1821.Sur l'existence de la licorne.Nouvelles Annales des Voyages 10: 412-414.
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Campbell, J. 1821.Noch ein Einhorn!.Notizen aus dem Gebiete der Natur- und Heilkunde 1 (10): 153-154.
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Campbell, J. 1821.Discovery of the unicorn in Africa.Asiatic Journal 1821: 36.