Playground conditions

Chicago citation style
Shull, H. Earle. Playground conditions. 1970-03-13. Retrieved from the Digital Public Library of America, http://digital.library.temple.edu/cdm/ref/collection/p15037coll3/id/29470. (Accessed December 18, 2018.)
APA citation style
Shull, H. Earle, (1970-03-13) Playground conditions. Retrieved from the Digital Public Library of America, http://digital.library.temple.edu/cdm/ref/collection/p15037coll3/id/29470
MLA citation style
Shull, H. Earle. Retrieved from the Digital Public Library of America <http://digital.library.temple.edu/cdm/ref/collection/p15037coll3/id/29470>.
Note: These citations are programmatically generated and may be incomplete.