Cita APA (7a ed.)

Seminar on Opinion Polls, ESOMAR, & World Association for Public Opinion Research. (1989). Seminar on opinion polls, Seville (Spain) 22nd-25th February 1989. ESOMAR.

Cita Chicago Style (17a ed.)

Seminar on Opinion Polls, ESOMAR, y World Association for Public Opinion Research. Seminar on Opinion Polls, Seville (Spain) 22nd-25th February 1989. Amsterdam: ESOMAR, 1989.

Cita MLA (9a ed.)

Seminar on Opinion Polls, et al. Seminar on Opinion Polls, Seville (Spain) 22nd-25th February 1989. ESOMAR, 1989.