Nagle, G., & Spencer, K. (1996). Investigating geography: Case studies and structural questions. Hodder & Stoughton.
Chicago-viite (17. p.)Nagle, Garrett, ja Kris Spencer. Investigating Geography: Case Studies and Structural Questions. London: Hodder & Stoughton, 1996.
MLA-viite (9. p.)Nagle, Garrett, ja Kris Spencer. Investigating Geography: Case Studies and Structural Questions. Hodder & Stoughton, 1996.
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