Cita APA (7a ed.)
Thoreau, H. D., & Polley, R. L. (1966). America the beautiful in the words of Henry David Thoreau ([1st ed.].). Country Beautiful Foundation.
Cita Chicago Style (17a ed.)
Thoreau, Henry David, y Robert L. Polley. America the Beautiful in the Words of Henry David Thoreau. [1st ed.]. Waukesha, Wis.: Country Beautiful Foundation, 1966.
Cita MLA (9a ed.)
Thoreau, Henry David, y Robert L. Polley. America the Beautiful in the Words of Henry David Thoreau. [1st ed.]. Country Beautiful Foundation, 1966.
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