Steers, J. A. (1983). The unstable earth: Some recent views in geography. Kalyani Publishers.
Cita Chicago (17th ed.)Steers, J. A. The Unstable Earth: Some Recent Views in Geography. New Delhi: Kalyani Publishers, 1983.
Cita MLA (9th ed.)Steers, J. A. The Unstable Earth: Some Recent Views in Geography. Kalyani Publishers, 1983.
Atenció: Aquestes cites poden no estar 100% correctes.