Railroad axle and wheels

Chicago citation style
Railroad axle and wheels. circa 1940-1990. Retrieved from the Digital Public Library of America, http://libx.bsu.edu/cdm/ref/collection/MunHisPhoto/id/3535. (Accessed July 15, 2018.)
APA citation style
(circa 1940-1990) Railroad axle and wheels. Retrieved from the Digital Public Library of America, http://libx.bsu.edu/cdm/ref/collection/MunHisPhoto/id/3535
MLA citation style
Retrieved from the Digital Public Library of America <http://libx.bsu.edu/cdm/ref/collection/MunHisPhoto/id/3535>.
Note: These citations are programmatically generated and may be incomplete.