Loud speaker arrangement

Chicago citation style
Loud speaker arrangement. 1933-04-30. Retrieved from the Digital Public Library of America, http://digital.library.temple.edu/cdm/ref/collection/p15037coll3/id/61861. (Accessed September 23, 2018.)
APA citation style
(1933-04-30) Loud speaker arrangement. Retrieved from the Digital Public Library of America, http://digital.library.temple.edu/cdm/ref/collection/p15037coll3/id/61861
MLA citation style
Retrieved from the Digital Public Library of America <http://digital.library.temple.edu/cdm/ref/collection/p15037coll3/id/61861>.
Note: These citations are programmatically generated and may be incomplete.