Ackerman, E.A.1958: Geography as a fundamental research discipline. Chicago: University of Chicago, Department of Geography , Research Paper No. 53.
2.
Allen J.1987: Realism as method (review essay on Sayer's method in social science). Antipode19, 231-34.
3.
Bhaskar, R.1979: The possibility of naturalism. Brighton : Harvester Press.
4.
Giddens, A.1979: Central problems in social theory. London: Macmillan. 1984: The constitution of society. Cambridge: Polity Press.
5.
Gregory, D.1978: Ideology, science and human geography. London: Hutchinson. 1980: The ideology of control: systems theory and geography. Tijdschrift voor Economische en Sociale Geografie71, 327-42.
6.
Harvey, D.1969: Explanation in geography. London: Edward Arnold.
7.
Holt-Jensen, A.1981: Geography: its history and concepts. London: Harper and Row. 1988: Geography - history and concepts, second edition. London : Paul Chapman.
8.
Hurst, M.E.1985: Geography has neither existence nor future. In Johnston, R., editor, The future of geography , London: Methuen, 59-91.
9.
James, P.1972: All possible worlds: a history of geographical ideas. Indianapolis: Odyssey Press.
10.
Johnston, R.J., editor, 1985a: The future of geography. London: Methuen.
11.
1985 b: To the ends of the earth. In Johnston, R.J., editor, The future of geography, London: Methuen, 326-38.
12.
1986 a: Philosophy and human geography, second edition. London: Edward Arnold.
13.
1986 b: On human geography. Oxford: Basil Blackwell.
14.
1987 : Geography and geographers: Anglo-American human geography since 1945, third edition. London: Edward Arnold.
15.
1989 : Philosophy, ideology and geography. In Gregory, D. and Walford, R., editors, Horizons in human geography, London: Macmillan, 48-66.
16.
Keat, R. and Urry, J.1982: Social theory as science, second edition. London: Routledge and Kegan Paul.
17.
Mandel, E.1976: Introduction. In Marx, K. Capital, Volume 1, Harmondsworth: Penguin, 11-86.
18.
Nordgaard, A.1972: Korologiske metoder. Oslo: University of Oslo, Department of Geography.
19.
Østerberg, D.1975: Essays i samfunnsteori. Oslo: Pax.
20.
Quaini, M.1982: Geography and Marxism. Oxford: Basil Blackwell.
21.
Sayer, A.1984: Method in social science. A realist approach. London: Hutchinson. 1985: Realism and geography. In Johnston, R., editor, The future of geography, London: Methuen, 159-73.
22.
Stoddart, D.1967: Organism and ecosystem as geographical models. In Chorley, R. and Haggett, P., editors, Models in geography, London: Methuen, 511-48.
23.
Taylor, P.1985: The value of a geographical perspective. In Johnston, R., editor, The future of geography , London: Methuen, 92-110.
24.
Williams, S.1981: Realism, Marxism and human geography. Antipode13(2), 31-38.