ADEL, two types, maneuverable rescue, free fall

Chicago citation style
ADEL, two types, maneuverable rescue, free fall. 1980-12-03. Retrieved from the Digital Public Library of America, http://ark.digitalcommonwealth.org/ark:/50959/x920h062b. (Accessed July 17, 2018.)
APA citation style
(1980-12-03) ADEL, two types, maneuverable rescue, free fall. Retrieved from the Digital Public Library of America, http://ark.digitalcommonwealth.org/ark:/50959/x920h062b
MLA citation style
Retrieved from the Digital Public Library of America <http://ark.digitalcommonwealth.org/ark:/50959/x920h062b>.
Note: These citations are programmatically generated and may be incomplete.