Mr. Thoreau declines an invitation; two unpublished papers by Thoreau: an original letter and an annotated questionnaire

Chicago citation style
Thoreau, Henry David, 1817-1862. Mr. Thoreau declines an invitation; two unpublished papers by Thoreau: an original letter and an annotated questionnaire. 1956. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/007935980. (Accessed November 19, 2018.)
APA citation style
Thoreau, Henry David, 1817-1862, (1956) Mr. Thoreau declines an invitation; two unpublished papers by Thoreau: an original letter and an annotated questionnaire. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/007935980
MLA citation style
Thoreau, Henry David, 1817-1862. Retrieved from the Digital Public Library of America <http://catalog.hathitrust.org/Record/007935980>.
Note: These citations are programmatically generated and may be incomplete.