Barnes, T.J.1996: Logics of dislocation: models, metaphors and meanings of economic space. New York and London: Guilford Press.
2.
Chorley, R.J.and Haggett, P.,editors 1967: Models in geography. London: Methuen.
3.
Harvey, D.1969: Explanation in geography. London: Edward Arnold.
4.
Johnston, R.J.1997: Geography and geographers: Anglo-American human geography since 1945 (fifth edition). London: Arnold.
5.
Lukermann, F.E.1964a: Geography among the sciences. Minneapolis: Kalamata.
6.
Lukermann, F.E.1964b: Geography as a formal intellectual discipline and the way in which it contributes to human knowledge. Canadian Geographer8, 167–172.