Helmet

Chicago citation style
Helmet. 1982. Retrieved from the Digital Public Library of America, http://ark.digitalcommonwealth.org/ark:/50959/df65vz958. (Accessed June 22, 2018.)
APA citation style
(1982) Helmet. Retrieved from the Digital Public Library of America, http://ark.digitalcommonwealth.org/ark:/50959/df65vz958
MLA citation style
Retrieved from the Digital Public Library of America <http://ark.digitalcommonwealth.org/ark:/50959/df65vz958>.
Note: These citations are programmatically generated and may be incomplete.