Lyell, C. (1969). Principles of geology, being an attempt to explain the former: Changes of the earth's surface by reference to causes now in operation. Johnson Reprint Corp..
Citace podle Chicago (17th ed.)Lyell, Charles. Principles of Geology, Being an Attempt to Explain the Former: Changes of the Earth's Surface by Reference to Causes Now in Operation. New York: Johnson Reprint Corp., 1969.
Citace podle MLA (9th ed.)Lyell, Charles. Principles of Geology, Being an Attempt to Explain the Former: Changes of the Earth's Surface by Reference to Causes Now in Operation. Johnson Reprint Corp., 1969.
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