Seminar on Opinion Polls. (1987). Seminar on opinion polls Strasbourg (France) 26th-28th november 1986. ESOMAR.
Cita Chicago Style (17a ed.)Seminar on Opinion Polls. Seminar on Opinion Polls Strasbourg (France) 26th-28th November 1986. Amsterdam: ESOMAR, 1987.
Cita MLA (9a ed.)Seminar on Opinion Polls. Seminar on Opinion Polls Strasbourg (France) 26th-28th November 1986. ESOMAR, 1987.
Precaución: Estas citas no son 100% exactas.
