APA-viite (7. p.)

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

Chicago-viite (17. p.)

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

MLA-viite (9. p.)

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