Helmet

Chicago citation style
Helmet. 1980-06. Retrieved from the Digital Public Library of America, http://ark.digitalcommonwealth.org/ark:/50959/nz809781m. (Accessed June 22, 2018.)
APA citation style
(1980-06) Helmet. Retrieved from the Digital Public Library of America, http://ark.digitalcommonwealth.org/ark:/50959/nz809781m
MLA citation style
Retrieved from the Digital Public Library of America <http://ark.digitalcommonwealth.org/ark:/50959/nz809781m>.
Note: These citations are programmatically generated and may be incomplete.