Summers, G. F. (1970). Attitude measurement. Rand McNally.
Cita Chicago Style (17a ed.)Summers, Gene F. Attitude Measurement. Chicago: Rand McNally, 1970.
Cita MLA (8a ed.)Summers, Gene F. Attitude Measurement. Rand McNally, 1970.
Precaución: Estas citas no son 100% exactas.