Students solving a math equation at the blackboard, 1960s

Chicago citation style
Unknown. Students solving a math equation at the blackboard, 1960s. 1960-1969. Retrieved from the Digital Public Library of America, https://utah-primoprod.hosted.exlibrisgroup.com/primo-explore/fulldisplay?docid=digcoll_usu_16USU_Photos/459&context=L&vid=MWDL. (Accessed August 19, 2019.)
APA citation style
Unknown, (1960-1969) Students solving a math equation at the blackboard, 1960s. Retrieved from the Digital Public Library of America, https://utah-primoprod.hosted.exlibrisgroup.com/primo-explore/fulldisplay?docid=digcoll_usu_16USU_Photos/459&context=L&vid=MWDL
MLA citation style
Unknown. Retrieved from the Digital Public Library of America <https://utah-primoprod.hosted.exlibrisgroup.com/primo-explore/fulldisplay?docid=digcoll_usu_16USU_Photos/459&context=L&vid=MWDL>.
Note: These citations are programmatically generated and may be incomplete.