Pounds, N. J. G. (1963). Political geography. Mcgraw- Hill.
Cita Chicago (17th ed.)Pounds, Norman J. G. Political Geography. New york: Mcgraw- Hill, 1963.
Cita MLA (9th ed.)Pounds, Norman J. G. Political Geography. Mcgraw- Hill, 1963.
Atenció: Aquestes cites poden no estar 100% correctes.