Christopherson, R. W. (1994). Applied physical geography: Geosystems in the laboratory. Macmillan.
Cita Chicago (17th ed.)Christopherson, Robert W. Applied Physical Geography: Geosystems in the Laboratory. New York: Macmillan, 1994.
Cita MLA (9th ed.)Christopherson, Robert W. Applied Physical Geography: Geosystems in the Laboratory. Macmillan, 1994.
Atenció: Aquestes cites poden no estar 100% correctes.