Cita APA (7a ed.)
Douglas, M. Natural Symbols: Explorations in Cosmology. Routledge.
Cita estilo Chicago (17a ed.)
Douglas, Mary. Natural Symbols: Explorations in Cosmology. Londres, Inglaterra: Routledge.
Cita MLA (9a ed.)
Douglas, Mary. Natural Symbols: Explorations in Cosmology. Routledge.
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