Farr, R. (1969). Reading: What can be measured? IRA.
Cita Chicago Style (17a ed.)Farr, Roger. Reading: What Can Be Measured? Newark: IRA, 1969.
Cita MLA (9a ed.)Farr, Roger. Reading: What Can Be Measured? IRA, 1969.
Precaución: Estas citas no son 100% exactas.