Pritchard, A. (1834). The natural history of animalcules: Containing descriptions of all the known species of infusoria; with instructions for procuring and viewing them, &c. Whittaker.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Pritchard, Andrew. The Natural History of Animalcules: Containing Descriptions of All the Known Species of Infusoria; with Instructions for Procuring and Viewing Them, &c. London: Whittaker, 1834.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Pritchard, Andrew. The Natural History of Animalcules: Containing Descriptions of All the Known Species of Infusoria; with Instructions for Procuring and Viewing Them, &c. Whittaker, 1834.
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