Playfair, J. (1802). Illustrations of the Huttonian theory of the earth. Cadell and Davies William Creech fNeill & Co.).
Lua i Stíl Chicago (17ú heag.)Playfair, John. Illustrations of the Huttonian Theory of the Earth. London, Edinburgh, e(Edinburgh: Cadell and Davies William Creech fNeill & Co.), 1802.
Lua MLA (9ú heag.)Playfair, John. Illustrations of the Huttonian Theory of the Earth. Cadell and Davies William Creech fNeill & Co.), 1802.
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