Switek, B. (2012). Written in stone: The hidden secrets of fossils and the story of life on earth. Icon.
Cita Chicago Style (17a ed.)Switek, Brian. Written in Stone: The Hidden Secrets of Fossils and the Story of Life on Earth. London: Icon, 2012.
Cita MLA (9a ed.)Switek, Brian. Written in Stone: The Hidden Secrets of Fossils and the Story of Life on Earth. Icon, 2012.
Precaución: Estas citas no son 100% exactas.