Helicopter installing rooftop ventilating system

Chicago citation style
Helicopter installing rooftop ventilating system. 1978. Retrieved from the Digital Public Library of America, http://www.idaillinois.org/cdm/ref/collection/nelgincco01/id/424. (Accessed November 28, 2020.)
APA citation style
(1978) Helicopter installing rooftop ventilating system. Retrieved from the Digital Public Library of America, http://www.idaillinois.org/cdm/ref/collection/nelgincco01/id/424
MLA citation style
Retrieved from the Digital Public Library of America <http://www.idaillinois.org/cdm/ref/collection/nelgincco01/id/424>.
Note: These citations are programmatically generated and may be incomplete.