Cita APA (7th ed.)

Hobbs, J. J. (2009). World regional geography (6th ed.). Brooks/Cole, Cengage Learning.

Cita Chicago (17th ed.)

Hobbs, Joseph J. World Regional Geography. 6th ed. Belmont, CA: Brooks/Cole, Cengage Learning, 2009.

Cita MLA (9th ed.)

Hobbs, Joseph J. World Regional Geography. 6th ed. Brooks/Cole, Cengage Learning, 2009.