Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.