APA
Lyell C., . (2009). Principles of Geology: An Attempt to Explain the Former Changes of the Earths Surface, by Reference to Causes Now in Operation: Vol 2. NEW YORK: Cambridge University Press.
Chicago
Lyell Charles, . 2009. Principles of Geology: An Attempt to Explain the Former Changes of the Earths Surface, by Reference to Causes Now in Operation: Vol 2. NEW YORK: Cambridge University Press.
Harvard
Lyell C., . (2009). Principles of Geology: An Attempt to Explain the Former Changes of the Earths Surface, by Reference to Causes Now in Operation: Vol 2. NEW YORK: Cambridge University Press.
MLA
Lyell Charles, . Principles of Geology: An Attempt to Explain the Former Changes of the Earths Surface, by Reference to Causes Now in Operation: Vol 2. NEW YORK: Cambridge University Press. 2009.
