APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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