Cita APA (7th ed.)

Salter, C. L., & Hobbs, J. J. (2003). Essentials of world regional geography (4th ed.). Thomson Brooks/Cole.

Cita Chicago (17th ed.)

Salter, Christopher L., i Joseph John Hobbs. Essentials of World Regional Geography. 4th ed. South Melbourne, Vic., Australia: Thomson Brooks/Cole, 2003.

Cita MLA (9th ed.)

Salter, Christopher L., i Joseph John Hobbs. Essentials of World Regional Geography. 4th ed. Thomson Brooks/Cole, 2003.