Cita APA (7th ed.)

Clawson, D. L., & Fisher, J. S. (1998). World regional geography: A development approach (6th ed.). Prentice Hall.

Cita Chicago (17th ed.)

Clawson, David L., i James S. Fisher. World Regional Geography: A Development Approach. 6th ed. Upper Saddle River, New Jersey: Prentice Hall, 1998.

Cita MLA (9th ed.)

Clawson, David L., i James S. Fisher. World Regional Geography: A Development Approach. 6th ed. Prentice Hall, 1998.