Cope, M., & Elwood, S. (2009). Qualitative GIS: A mixed methods approach. Sage.
Lua i Stíl Chicago (17ú heag.)Cope, Meghan, agus Sarah Elwood. Qualitative GIS: A Mixed Methods Approach. London: Sage, 2009.
Lua MLA (9ú heag.)Cope, Meghan, agus Sarah Elwood. Qualitative GIS: A Mixed Methods Approach. Sage, 2009.
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