"Foreman Clark and two of the shaftmen, Arthur Roberts and Sam Mynatt, at the mouth of the test tunnel at Norris Dam site."

Chicago citation style
Tennessee Valley Authority. 1933. "Foreman Clark and two of the shaftmen, Arthur Roberts and Sam Mynatt, at the mouth of the test tunnel at Norris Dam site.". 1933-10-26. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/532663. (Accessed October 20, 2018.)
APA citation style
Tennessee Valley Authority. 1933, (1933-10-26) "Foreman Clark and two of the shaftmen, Arthur Roberts and Sam Mynatt, at the mouth of the test tunnel at Norris Dam site.". Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/532663
MLA citation style
Tennessee Valley Authority. 1933. Retrieved from the Digital Public Library of America <http://catalog.archives.gov/id/532663>.
Note: These citations are programmatically generated and may be incomplete.