Alexander Graham Bell's Telephone Patent Drawing and Oath

Chicago citation style
Department of Commerce. Patent and Trademark Office. 1975-. Alexander Graham Bell's Telephone Patent Drawing and Oath. 1876-03-07. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/302052. (Accessed August 18, 2018.)
APA citation style
Department of Commerce. Patent and Trademark Office. 1975-, (1876-03-07) Alexander Graham Bell's Telephone Patent Drawing and Oath. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/302052
MLA citation style
Department of Commerce. Patent and Trademark Office. 1975-. Retrieved from the Digital Public Library of America <http://catalog.archives.gov/id/302052>.
Note: These citations are programmatically generated and may be incomplete.