The Pennsylvania Study

Chicago citation style
The Pennsylvania Study. 2009. Retrieved from the Digital Public Library of America, http://digitalcollections.powerlibrary.org/cdm/ref/collection/slppadocs/id/27013. (Accessed December 14, 2018.)
APA citation style
(2009) The Pennsylvania Study. Retrieved from the Digital Public Library of America, http://digitalcollections.powerlibrary.org/cdm/ref/collection/slppadocs/id/27013
MLA citation style
Retrieved from the Digital Public Library of America <http://digitalcollections.powerlibrary.org/cdm/ref/collection/slppadocs/id/27013>.
Note: These citations are programmatically generated and may be incomplete.