APA
Salter C. L., Hobbs j. J. & Kostbade J. T. (1998). World regional geography. Florida: Harcourt brace.
Chicago
Salter Christopher L, Hobbs joseph J and Kostbade J Trenton. 1998. World regional geography. Florida: Harcourt brace.
Harvard
Salter C. L., Hobbs j. J. and Kostbade J. T. (1998). World regional geography. Florida: Harcourt brace.
MLA
Salter Christopher L, Hobbs joseph J and Kostbade J Trenton. World regional geography. Florida: Harcourt brace. 1998.