Christopherson, R. W., & Hobbs, G. L. (1998). Applied physical geography: Geosystems in the laboratory (2nd ed.). Prentice-Hall of India.
Čikaški stil citiranjaChristopherson, Robert W., i Gail Lewis Hobbs. Applied Physical Geography: Geosystems in the Laboratory. 2nd ed. London: Prentice-Hall of India, 1998.
MLA način citiranjaChristopherson, Robert W., i Gail Lewis Hobbs. Applied Physical Geography: Geosystems in the Laboratory. 2nd ed. Prentice-Hall of India, 1998.
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