Wheeler, J. H., Kostbade, J. T., & Thoman, R. S. (1969). Regional geography of the world. Holt, Rinehart and Winston.
Lua i Stíl Chicago (17ú heag.)Wheeler, Jesse H., J. Trenton Kostbade, agus Richard S. Thoman. Regional Geography of the World. New York: Holt, Rinehart and Winston, 1969.
Lua MLA (9ú heag.)Wheeler, Jesse H., et al. Regional Geography of the World. Holt, Rinehart and Winston, 1969.
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