Instructor observes how far child can bend backwards

Chicago citation style
Bernstein, Joshua. Instructor observes how far child can bend backwards. 1972-09-06. Retrieved from the Digital Public Library of America, http://digital.library.temple.edu/cdm/ref/collection/p15037coll3/id/15302. (Accessed December 13, 2018.)
APA citation style
Bernstein, Joshua, (1972-09-06) Instructor observes how far child can bend backwards. Retrieved from the Digital Public Library of America, http://digital.library.temple.edu/cdm/ref/collection/p15037coll3/id/15302
MLA citation style
Bernstein, Joshua. Retrieved from the Digital Public Library of America <http://digital.library.temple.edu/cdm/ref/collection/p15037coll3/id/15302>.
Note: These citations are programmatically generated and may be incomplete.