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, http://utah-primoprod.hosted.exlibrisgroup.com/primo_library/libweb/action/dlDisplay.do?vid=MWDL&afterPDS=true&docId=digcoll_usu_16USU_Photos/459. (Accessed November 16, 2018.)
APA citation style
Unknown, (1960-1969) Students solving a math equation at the blackboard, 1960s. Retrieved from the Digital Public Library of America, http://utah-primoprod.hosted.exlibrisgroup.com/primo_library/libweb/action/dlDisplay.do?vid=MWDL&afterPDS=true&docId=digcoll_usu_16USU_Photos/459
MLA citation style
Unknown. Retrieved from the Digital Public Library of America <http://utah-primoprod.hosted.exlibrisgroup.com/primo_library/libweb/action/dlDisplay.do?vid=MWDL&afterPDS=true&docId=digcoll_usu_16USU_Photos/459>.
Note: These citations are programmatically generated and may be incomplete.