Clodd 1926, pp. 71–4. Clodd, Edward (1926), Memories, London: Watts & Co..
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Bucher 1979, pp. 17. Bucher, Henry H. , Jr. (1979), "Canonization by repetition: Paul du Chaillu in historiography", Revue Française d'Histoire d'Outre-mer, 66 (242): 15–32, doi:10.3406/outre.1979.2174.
Bucher 1979, pp. 28–30. Bucher, Henry H. , Jr. (1979), "Canonization by repetition: Paul du Chaillu in historiography", Revue Française d'Histoire d'Outre-mer, 66 (242): 15–32, doi:10.3406/outre.1979.2174.
One or more of the preceding sentences incorporates text from a publication now in the public domain: Chisholm, Hugh, ed. (1911). "Du Chaillu, Paul Belloni". Encyclopædia Britannica (به انگلیسی). Vol. 8 (11th ed.). Cambridge University Press. p. 629.