Franzen, R. (1922). The accomplishment ratio. Columbia University.
Cita Chicago Style (17a ed.)Franzen, Raymond. The Accomplishment Ratio. New York: Columbia University, 1922.
Cita MLA (9a ed.)Franzen, Raymond. The Accomplishment Ratio. Columbia University, 1922.
Precaución: Estas citas no son 100% exactas.