APA (7th ed.) Citation

Poulsen, T. M., & Sharkov, D. (1995). Nations and states: A geographic background to world affairs. Prentice Hall.

Chicago Style (17th ed.) Citation

Poulsen, Thomas M., and Dimitry Sharkov. Nations and States: A Geographic Background to World Affairs. Englewood Cliffs, N.J: Prentice Hall, 1995.

MLA (9th ed.) Citation

Poulsen, Thomas M., and Dimitry Sharkov. Nations and States: A Geographic Background to World Affairs. Prentice Hall, 1995.