Cita APA (7th ed.)

Christopherson, R. W., & Hobbs, G. L. (1998). Applied physical geography: Geosystems in the laboratory (2nd ed.). Prentice Hall.

Cita Chicago (17th ed.)

Christopherson, Robert W., i Gail L. Hobbs. Applied Physical Geography: Geosystems in the Laboratory. 2nd ed. Upper Saddle River, NJ: Prentice Hall, 1998.

Cita MLA (9th ed.)

Christopherson, Robert W., i Gail L. Hobbs. Applied Physical Geography: Geosystems in the Laboratory. 2nd ed. Prentice Hall, 1998.