Cita APA
Christopher, R. W. (1994). Geosystems: An introduction to physical geography (2nd ed.). Macmillan.
Citación estilo Chicago
Christopher, Robert W. Geosystems: An Introduction to Physical Geography. 2nd ed. New York: Macmillan, 1994.
Cita MLA
Christopher, Robert W. Geosystems: An Introduction to Physical Geography. 2nd ed. Macmillan, 1994.
Warning: These citations may not always be 100% accurate.