The work of invisible helpers

Chicago citation style
Tuttle, Amber M. The work of invisible helpers. 1945. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/005776544. (Accessed December 14, 2018.)
APA citation style
Tuttle, Amber M, (1945) The work of invisible helpers. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/005776544
MLA citation style
Tuttle, Amber M. Retrieved from the Digital Public Library of America <http://catalog.hathitrust.org/Record/005776544>.
Note: These citations are programmatically generated and may be incomplete.