Cita APA (7a ed.)
Lyell, C., & Rudwick, M. J. S. (1991). Principles of geology. University of Chicago Press.
Cita Chicago Style (17a ed.)
Lyell, Charles, y M. J. S. Rudwick. Principles of Geology. Chicago: University of Chicago Press, 1991.
Cita MLA (9a ed.)
Lyell, Charles, y M. J. S. Rudwick. Principles of Geology. University of Chicago Press, 1991.
Precaución: Estas citas no son 100% exactas.