Lyell, C. S. (2010). Principles of Geology: An Attempt to Explain the Former Changes of the Earth's Surface, by Reference to Causes now in Operation. Cambridge University Press. https://doi.org/10.1017/CBO9780511701566
Lua i Stíl Chicago (17ú heag.)Lyell, Charles Sir. Principles of Geology: An Attempt to Explain the Former Changes of the Earth's Surface, by Reference to Causes Now in Operation. Cambridge: Cambridge University Press, 2010. https://doi.org/10.1017/CBO9780511701566.
Lua MLA (9ú heag.)Lyell, Charles Sir. Principles of Geology: An Attempt to Explain the Former Changes of the Earth's Surface, by Reference to Causes Now in Operation. Cambridge University Press, 2010. https://doi.org/10.1017/CBO9780511701566.
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