Cita APA (7a ed.)
Bell, F. Environmental Geology: Principles and Practice. Blackwell.
Cita estilo Chicago (17a ed.)
Bell, F.G. Environmental Geology: Principles and Practice. Malden, EUA: Blackwell.
Cita MLA (9a ed.)
Bell, F.G. Environmental Geology: Principles and Practice. Blackwell.
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