Cita APA (7a ed.)

ESOMAR. (1991). Papers on the over 50s in the 90s: Factors for successful marketing of products and services. E.S.O.M.A.R.

Cita Chicago Style (17a ed.)

ESOMAR. Papers on the over 50s in the 90s: Factors for Successful Marketing of Products and Services. Amsterdam: E.S.O.M.A.R, 1991.

Cita MLA (9a ed.)

ESOMAR. Papers on the over 50s in the 90s: Factors for Successful Marketing of Products and Services. E.S.O.M.A.R, 1991.