APA (7th ed.) Citation

Lyell, C. (1840). Principles of geology (6. ed.). Murray.

Chicago Style (17th ed.) Citation

Lyell, Charles. Principles of Geology. 6. ed. London: Murray, 1840.

MLA (9th ed.) Citation

Lyell, Charles. Principles of Geology. 6. ed. Murray, 1840.

Warning: These citations may not always be 100% accurate.