Chisholm, M. (1975). Human geography: Evolution or revolutionn. Penguin.
Cita Chicago (17th ed.)Chisholm, Michael. Human Geography: Evolution or Revolutionn. Harmondsworth, England: Penguin, 1975.
Cita MLA (9th ed.)Chisholm, Michael. Human Geography: Evolution or Revolutionn. Penguin, 1975.
Atenció: Aquestes cites poden no estar 100% correctes.