Professor teaching math to a group of students, 1960s

Chicago citation style
Unknown. Professor teaching math to a group of students, 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/456. (Accessed November 14, 2018.)
APA citation style
Unknown, (1960-1969) Professor teaching math to a group of students, 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/456
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/456>.
Note: These citations are programmatically generated and may be incomplete.