Billings Business College, Howard C. Porter and student with stenographer machine.

Chicago citation style
Unknown. Billings Business College, Howard C. Porter and student with stenographer machine.. 1962. Retrieved from the Digital Public Library of America, http://cdm16013.contentdm.oclc.org/cdm/ref/collection/p16013coll53/id/165. (Accessed September 29, 2020.)
APA citation style
Unknown, (1962) Billings Business College, Howard C. Porter and student with stenographer machine.. Retrieved from the Digital Public Library of America, http://cdm16013.contentdm.oclc.org/cdm/ref/collection/p16013coll53/id/165
MLA citation style
Unknown. Retrieved from the Digital Public Library of America <http://cdm16013.contentdm.oclc.org/cdm/ref/collection/p16013coll53/id/165>.
Note: These citations are programmatically generated and may be incomplete.