Citazione Stile APA (7a Edizione)

Christopherson, R. W. (1995). Elemental geosystems: A foundation in physical geography. Prentice Hall.

Citazione stile Chigago Style (17a edizione)

Christopherson, Robert W. Elemental Geosystems: A Foundation in Physical Geography. Englewood Cliffs, N.J.: Prentice Hall, 1995.

Citatione MLA (8a ed.)

Christopherson, Robert W. Elemental Geosystems: A Foundation in Physical Geography. Prentice Hall, 1995.