A scale of performance tests

Chicago citation style
Pintner, Rudolf, 1921. A scale of performance tests. 1921. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/100024561. (Accessed October 22, 2018.)
APA citation style
Pintner, Rudolf, 1921, (1921) A scale of performance tests. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/100024561
MLA citation style
Pintner, Rudolf, 1921. Retrieved from the Digital Public Library of America <http://catalog.hathitrust.org/Record/100024561>.
Note: These citations are programmatically generated and may be incomplete.