Cattermole, P. (1969). The world of geology. Muller.
Cita Chicago (17th ed.)Cattermole, Peter. The World of Geology. Great Britain: Muller, 1969.
Cita MLA (9th ed.)Cattermole, Peter. The World of Geology. Muller, 1969.
Atenció: Aquestes cites poden no estar 100% correctes.