Christopherson, R. W. (1995). Elemental geosystems: A foundation in physical geography. Prentice Hall.
芝加哥风格引文Christopherson, Robert W. Elemental Geosystems: A Foundation in Physical Geography. Englewood Cliffs, N.J.: Prentice Hall, 1995.
MLA引文Christopherson, Robert W. Elemental Geosystems: A Foundation in Physical Geography. Prentice Hall, 1995.
警告：这些引文格式不一定是100％准确.