APA
Princeton University, . (1940). Research report series / Industrial Relations Section, Department of Economics, Princeton University. Princeton, NJ: Industrial Relations Section, Princeton University.
Chicago
Princeton University, . 1940. Research report series / Industrial Relations Section, Department of Economics, Princeton University. Princeton, NJ: Industrial Relations Section, Princeton University.
Harvard
Princeton University, . (1940). Research report series / Industrial Relations Section, Department of Economics, Princeton University. Princeton, NJ: Industrial Relations Section, Princeton University.
MLA
Princeton University, . Research report series / Industrial Relations Section, Department of Economics, Princeton University. Princeton, NJ: Industrial Relations Section, Princeton University. 1940.