Ulrich Ruckriem with a worker

Chicago citation style
Ulrich Ruckriem with a worker. 1971?. Retrieved from the Digital Public Library of America, http://collections.si.edu/search/results.htm?q=record_ID%3AAAADCD_item_7920&repo=DPLA. (Accessed December 13, 2018.)
APA citation style
(1971?) Ulrich Ruckriem with a worker. Retrieved from the Digital Public Library of America, http://collections.si.edu/search/results.htm?q=record_ID%3AAAADCD_item_7920&repo=DPLA
MLA citation style
Retrieved from the Digital Public Library of America <http://collections.si.edu/search/results.htm?q=record_ID%3AAAADCD_item_7920&repo=DPLA>.
Note: These citations are programmatically generated and may be incomplete.