Barber shop structures

Chicago citation style
Richard Nicol. Barber shop structures. Retrieved from the Digital Public Library of America, http://cdm16786.contentdm.oclc.org/cdm/ref/collection/kccollects/id/438. (Accessed June 20, 2018.)
APA citation style
Richard Nicol, Barber shop structures. Retrieved from the Digital Public Library of America, http://cdm16786.contentdm.oclc.org/cdm/ref/collection/kccollects/id/438
MLA citation style
Richard Nicol. Retrieved from the Digital Public Library of America <http://cdm16786.contentdm.oclc.org/cdm/ref/collection/kccollects/id/438>.
Note: These citations are programmatically generated and may be incomplete.