Cattermole, P. (1969). The world of geology. Muller.
Cita Chicago Style (17a ed.)Cattermole, Peter. The World of Geology. Great Britain: Muller, 1969.
Cita MLA (9a ed.)Cattermole, Peter. The World of Geology. Muller, 1969.
Precaución: Estas citas no son 100% exactas.