APA (7th ed.) Citation

Sager, R. J., & Helgren, D. M. (2003). World geography today (Texas ed.). Holt, Rinehart, and Winston.

Chicago Style (17th ed.) Citation

Sager, Robert J., and David M. Helgren. World Geography Today. Texas ed. Austin: Holt, Rinehart, and Winston, 2003.

MLA (9th ed.) Citation

Sager, Robert J., and David M. Helgren. World Geography Today. Texas ed. Holt, Rinehart, and Winston, 2003.