Cita APA (7a ed.)

Douglas, M. (1973). Natural symbols: Explorations in cosmology. Vintage Books.

Cita Chicago Style (17a ed.)

Douglas, Mary. Natural Symbols: Explorations in Cosmology. New York: Vintage Books, 1973.

Cita MLA (8a ed.)

Douglas, Mary. Natural Symbols: Explorations in Cosmology. Vintage Books, 1973.