Christopherson, R. W. (1994). Geosystems: An introduction to physical Geography (2nd ed.). Macmillan.
芝加哥风格引文Christopherson, Robert W. Geosystems: An Introduction to Physical Geography. 2nd ed. Englewood Cliffs: Macmillan, 1994.
MLA引文Christopherson, Robert W. Geosystems: An Introduction to Physical Geography. 2nd ed. Macmillan, 1994.
警告：这些引文格式不一定是100％准确.