System Concept in Education. Professional Paper No. 20-74.

MLA

Human Resources Research Organization, Alexandria, VA., and Robert G. Smith. System Concept in Education. Professional Paper No. 20-74. 1 Nov. 1974. EBSCOhost, widgets.ebscohost.com/prod/customlink/proxify/proxify.php?count=1&encode=0&proxy=&find_1=&replace_1=&target=https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&scope=site&db=eric&AN=ED100019&authtype=sso&custid=ns315887.

APA

Human Resources Research Organization, A. V., & Smith, R. G. (1974). System Concept in Education. Professional Paper No. 20-74.

Chicago

Human Resources Research Organization, Alexandria, VA., and Robert G. Smith. 1974. “System Concept in Education. Professional Paper No. 20-74.” http://widgets.ebscohost.com/prod/customlink/proxify/proxify.php?count=1&encode=0&proxy=&find_1=&replace_1=&target=https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&scope=site&db=eric&AN=ED100019&authtype=sso&custid=ns315887.